F/2.8, Its the Following Three Optical Established

...... Expanding Horizons In Photography Canon's Ultrahigh-Performance L-Series FD Lenses The Ideal Achievement of Canon's Comprehensive Optical Engineering Capabilities

necessary. However, in caused by the different remaining in a lens are To eliminate this objectionable because aspherical lenses are A superb camera body is a practice, it is extremely wa velengths of the incident called "residual" aberrations. feature, asphericallenses designed to compensate for prerequisite for taking difficult to create lenses that light. All these aberrations Distinctive expressive have varying curvatures image disto rtion through the quality pictures. However, can approach the "ideal" in influence each o ther in nuances, such as softly which permit all incident use of ideal lens shapes. no matter how superb it may performance. Major obstacles complex ways and affect the out-of-fo cus images, are rays to fo cus at one point. Fo r Asphericallens elements also be, the camera body alone in achieving this include ( I ) image-forming performances produced by these residual example, t he FD 8Smm contribute to re ducing the does not suffice. It requires drawbacks attributable to the of lenses. Aberrations aberrations. f/l.2l short-telephoto lens, overall le ns size. For example, equally superb matching spherical c urvatur~ s of the featuring an extremely large the FD 14mm f/2.Sl uses an interchangeable lenses. elements, (2) pro blems fll.2 maximum aperture, asphericallens element wi th Canon's'\.! I tra-high­ ari sing fro m lens materials, Spherical aberrations are uses an aspherical element an extremely accurate performance l-series FD and (3) problems caused by Spherical aberrations, visible caused by spherical ele ments as its second element. The aspherical shape for the fro nt lenses have been developed as vary ing refractive indexes as flares, caused by spherical in the follo wing manner. lens enjoys an established first surface of its second lens the ideal and ultimate and the wavelengths of lenses affect picture clarity. Incid ent light coming from a reputation for its capabilities element. This element has achievements of Canon's various colors of incident This becomes a major subject, and travelling along to shoot high contrast made it possible to achieve a longstanding expertise in light. Any differences caused problem for fast lenses with the lens's optical axis, does pictures up to its maximum compact lens design; altho ugh optical engineering. by conditions such as those large apertures such as f/l.2. not converge at a single foool aperture. This is attributable it is a super wide-angle lens mentioned above between the Some of the l-series lenses point on the optical axis after to the asphericallens (with an extremely wide Each lens has been developed "ideal" lens and a lens have eliminated this problem passing through the lens, but element. diagonal angle of view of to attain the optical being evaluated are called by using an asphericallens spreads slightly. As a result, (2) Elimination of wide-angle 114°) capable of reproducing performance of the "ideal aberrations. To minimize element. clear images become image disto rtion distortion-free normal images. lens". An ideal lens is an such aberrations, optical Pictures taken using With a large maximum imagi nary lens which meets design theories have been aspherical wide·angle lenses aperture of f/2.8, its the following three optical established. The l -series FD have no disto rtio n even in maximum outer diameter preconditions essential for lenses have been developed to their peripheries. This is measures a mere 74mm. the ideal reproduction of achieve the Ultimate in picture subjects: (I) a dot correcting these aberrations. should be depicted as a dot, These lenses embody (2) a plane should be advanced o ptical concepts depicted as a plane, and (3) and are backed by excellent the picture should be a precision processing. They perfect reproduction of the use special lens materials, and subject with respect to its special asphericallens shape. The "ideal" lens elements, fluorite lens meeting all these elements, and UD glass requirements reproduces the elements. Consequently subject to perfection. To they give extremely high achieve high-performance performance. The designation ,,~~ lenses which can rival their " L" for Canon L-series impossible to obtain. In other viewed through a veil, since "ideal" counterparts in ultrahigh-performance lenses wo rds, incident light o f they lack definition. In optical capabilities, close stands for "luxury" and is different wave lengthS part icula r, 11l'lJ&...:lportun;: methodological studies of indicative of tho utm o~ t converges at different places lenses generate much flare o pticlll theories become aspiration to the "ideal lens" . on the optical axis depending due to large differences in on where it entered the lens the refractive indexes of their surface, at the periphery or cent ral portions and expresses subject depth. at the lens center. Thus, peripheries. Smaller apertures Asphericallenses eliminate In general, zoom lenses tend images formed by incident produce less flare. However, pin cushioning and to show barrel distortion as light rays which pass near the when using larger apertures, barrel-form distortion which zooming approaches the o ptical axis are surrounded greater flare is inevitable. To is found in photographs taken wide-angle end while pin by images fo rmed by other thoroughly solve this using conventional wide-angle cushion distortion increases rays which pass through the problem, asphericallenses and short focal length zoom at the telephoto end. Since lens periphery. This results have been developed with lenses. asphericallenses eliminate in what is called "flare". special surface curvatures, to these types of distortion, Pictures dis playing flare can make all incident rays I)icture distortion refers to a they are used in the super appear rather flat as though converge at one pOi nt. phenomenon in which the wide-angle lenses, wide-angle photograph does not lenses, and wide-angle zooms Aspherical element Fluorite dement accurately represent the in the L-series product line. Most lenses have curvatures subject. For example, a Using aspherical elements in Asphericallenses exhibit which represent sections of square plane fig ure may be its wide-angle zooms, Canon image area. In practice, several excellent optical spheres. In contrast, imaged like a pin cushio n or has led in the application of Ther.e are roughly two types different photographic characteristics which are asphericallenses have peculiar a barrel shape in the image aspherical elements. Among of aberrations or deviations situations call for a wide extremely difficult to achieve shapes, and specially formed fie ld. Thus, pictures are others, the FD 20 - 3Smm from the "ideal" lenses. range of interchangeable using spherical lenses. These peripheries for optimal distorted even if their f/3.SL incorporates an These are (I) Seidel's five lenses such as wide-angle and include (1) the elimination of refract ion of incident light to sharpness remains completely asp herical ele ment for monochromatic aberrations telephoto lenses making it large aperture spherical prodUce precise convergence. unaffected. The distortion enhanced o ptical and (2) chromatic aberration virtually impossible to aberration, and (2) the Lenses with non-spherical lens dealt with here is, however, performance while at the attributable to different achieve such "ideal lenses" elimination of wide-angle curvatures on their rotation quite different from image same time eli minating wavelengths. since more than the rays in distortion. symmetry are called deformation obtained as a barrel distortion. the vicinity of the optical result of the perspective If an image is form ed in a axis must be used. effect often seen in small area (called "Gauss's In addition, the chromalic wide-angle photographs. This do main") using only the dispersion of the lens is because the distortion is incident rays that are near the ele ments affects their optical cau sed by improper o ptical axis (i.e. rays at very performance. These various re fra ction in the lens while sma ll angles of incidence), aberrations can be d ivided perspective deformation aberrations are scarcely roughly into two categories detectable. If only such based o n how they affect incide nt rays close to the image fo rmation. One refers optical axes could be used, the to monochro matic "ideallens"could be realized. aberrations called "Seidel's However, the requirements for five aberratio ns" (Le. Subiect Lens photographic lenses include spherical aberration, comae, large apertures and an as tigmatism, image field ability to form sharp images, curvature, an d image edge-to-edge, with uniform distortion). The other is brightness over the entire chromatic aberration which is

A~rr a tion curve Pin cushion distortion "aspheri cal" lenses. Because entered due to different of the aspherical shape, lens refractive indexes between mass production is peripheral portions and technically d ifficult. central portions. Spherical As phericallens characteristics.: aberration appears as lo w­ Subject (I ) Elimination of large- contrast, flat pictures. In Lens axis aperture spherical aberra­ many cases, sm aller apertures tion correct this condition, but With a large-aperture this inevitably becomes a Optical domain nur the , for the spherical lens, incident light major drawback when optkal axis (GluSS'S dom.',) rays which "''''' nur the optical axis converges at various places pictures require wider depending on where it apertures. Barrel rorm distortion Canon FO in terchangeable lenses accidents, breakdowns, substandard For best results use Canon SLR are designed and manufactured to picture quality, etc. that are camera bodies with Canon FO be used with Canon SLR camera attributable to the use of lenses bodies. When so used, they will give interchangeable le nses of other best optical performance by makes with Canon camera bodies. capilalizing on the superb To make picture-taking your capabili ties incorporated in the lifelong pleasure, remember to use camera bodies. Canon FO lenses on your Canon Canon will not be responsible for """"'.

lenses, i.e. for ( I) t he desi2n. of lig ht. Chromatic aberration Due to their extremely (2) the polishing, and for (3) White light contains all the can be optically defined as complex aspherical the measurement. colors of the rainbow, or a deviation in focusing position shape, state-of-the-art Because of their continuously broad spectrum of light. from a reference focus point. engineering capabilities, far varying curvatures, expressing Because of wavelength I n other words, if a film is higher than those required for the shape of asphericallenses differences, chromatic placed at a green focus point, the development of spherical n umerically at the design aberration takes place. In all other image-forming colors lenses, are indispensable in stage is ex tremely difficu lt. particular, the correction of will converge on the film the following three areas to To facilitate this operat ion, chromatic aberration plane slightly in front of or develop asphericallensesj (1) Canon has adopted comp uter becomes a crucial factor in behind the green focal point designing, (2) polishing, and simulation techniques. designing telephoto lenses. producing a surrounding . ' (3) measurement. Canon's longstanding flare. T hts means a decrease polishing techniques for To produce ideal pictures, in sharpness. Chromatic spherical lens production the correction of chromatic aberration increases with There are t wo major reasons were no longer applicable to aberration became one focal length because of the why most lenses are asphericallens surfaces. For central problem to be solved. different locations of the manufactured with sp herical this reason, completely new Chromatic aberration is focal points of the various curvatures. First, spherical eq uipment had to be generated when white light colors produced by light curvatures can easily be developed. New measurement 16mm above optical axis such as sunlight is focused dispersion. For this expressed numerically which equipment using laser since it contains the broad reason, the correction of facilitates design. Second, technology had to be five asphericallenses. The spectrum o f colors observed chromatic aberration is st ill production is relatively easy. developed as well. Since the introduction of the history of these aspherical using a prism. This one of the most important R Far higher engineering As discussed, the production FO 55mm f/1.2AL, the lenses also reveals Canon's phenomenon results from tl1e & 0 themes to be worked out capabilities than those of asphericallenses has world's first aspherical Sl R adva nced optical engineering d ifferent wavelengths of these when designing telephoto conventionally required to become possible through the camera lens went on mass capabilities. colors and is called dispersion lenses. manufacture spherical lenses R&D of completely new production, Canon has become essential fo r the equipment and constantly been breaking production of aspherical manufacturing systems. fresh ground in the world of photography by adding a variety of new aspherical lenses to its interchangeable lens product line.

Although research had been conducted on aspherical lenses at various camera manufacturers, a number of years had to elapse before the first aspherical lens finally 111l1l<'n rcd o n the lIcncral 11 ho I 0"". pi Ih; 111111 k II I , ex I.:1l 1)[ for a few special-purpose t ! asp hericallenses. The Canon Contrast Contrast level level FD 55mm f/l .2AL (see L Shot with a spherical lens Shot with an asphericallens

one point on a subject The high performance of converge at the film plane. asphericallenses can easily be The black dots represent the photo) was the world's first understood by examining the places where image· forming interchangeable S lR spot diagrams. The aspherical light has impinged. The asphericallens to go into lens displays a sharp difference between the mass production. It was convergence of dots and degrees of dot convergence introduced to t he market in provides extremely flare-free directly represents the March of 1971 . Following reproductions. amount of flare inherent in this, the FO 24mm f/lAL spherical counterparts. T he and the FO 85mm f/I.2 l The spot diagrams below high performance of aspherical asphericallenses debuted on show how incident rays from lenses can be thus visualized. the occasion of the 1974 Photokina. Canon thus has taken the lead in expanding new horizons in aspherical lens application, even in the realm of interchangeable lenses. The L-series, at the moment, includes a total of

uncompensated for such as from a large-size artificial development was made With regular optical glass, the red (c-rays). Namely, an calcium fluoride (Ca F2 ) possible by two difficult residual chromatic aberration, achromatic lens can only crystal. In addition to a production technologies. or the secondary spectrum, compensate for chromatic higher degree of anomalous These involve the mixing of theoretically can not become aberration at two dispersion, it has a lower the required ingredients of smaller than the amount wavelengths. The remaining dispersion index when the glass and then calculated by the following chromatic aberration or the compared with an optical homogenizing this to form equation: the focal length x residual chromatic aberration glass counterpart. (Thus, a quality optical glass 2/1 ,OOOmm. To overcome or "secondary spectrum" these characteristics are material. T he excellent Omm on optical axis this drawback, fluorite came theoretically can not become effective for minimizing the optical performance of many into use as a new lens smaller than a amount secondary spectrum). An of the l -series lenses, (in material featuring various given by the equation; the achromatic lens made by particular, the high optical valuable optical focal length x 2/1 ,OOO mm, combining a convex fluorite definition of the telephoto characteristics not to be when optical glass materials element with a concave lenses) results largely from . .. ,. .;. . . found in regular optical glass. are used . To overcome this optical glass element the developments of these restriction, fluorite was eliminates nearly all chromatic fluorite and UO glass To compensate for chromatic adopted as a new type of aberration. materials. aberrat ion, two regular optical material. Fluorite In addition to fluorite, there o ptical glass elements are lenses are capable of is an excellent optical glass combined to create compensating for chromatic material which is highly achromatic lenses. These aberration at t hree effective in compensating for lenses are capable of wavelengths with chromatic aberration, called compensating for chromatic fluorite's distinctive optical "UO" glass. aberration in two characteristics, significantly This is produced wavelengths: for the yellow different from regular optical by dosing o ptical glass with (d-rays) and the purple glass materials. A fluorite fluorides. This new material Image (g-rays). However, light in element characterized by its features excellent fluorite ~~ above optical axis other wavelengths, remains anomalous dispersion is made optical performance. The - are then numerically The "C" curve shown in the conducted for these patterns image, a segment of a line, a fo r applications in telescopes Sharpness depends almost expressed in the form of MTF graph represents high laid out in both these comet-like appearance, etc. and other optical c'nlirely on two factors; curves. (I n actuality, resolving power all across the directions. In the graph Out-Of-focus highlights are instruments. However, resolving power and contrast. measurement is conducted spatial frequency ra nge by below, a meridional and a not acce ptable from an beca use of its extremely MTF graphs are used to dectronically). Taking th e always maintaining relatively sagittal curve are shown as a aesthetic point of view either, high price, artificial fluorite determine the sharpness ot MTF graph below as an high MTF values. Only high­ dotted line and a solid li ne, si nce they take on elliptical could not make headway in C:anon lenses. Why the L· example, the perfect performance lenses that show res pectively. MTF curves or comet-like appearance. photographic applications. series lenses have such reproduction condition is ideal MTF curves such as obtained this way indicate The high meridional and Against this backdrop, excellent sharpness can be expressed by an MTF value of this are added to the Canon FD the astigmatic and coma tic sag ittal MTF values obtained Canon embarked on the R & understood from these I which refers to a I; I ratio, lens product line, especially, aberration of the lens under on the L·se ries lenses also f) of the production 1!raphs. or a ratio of perfectly­ to its select L-series. evaluation. If either one of substantiate their solid techniques for artificial reproduced contrast to a t he curves, the merid ional or reputations for their excellent fluorite and succeeded in When discussing the optical unity value of I which sagittal curve, drops too far sharpness and capabilities to developing its first two " achieve excellent out-Of-focus performance of any lens, represe nt s the contrast of the ,, , in MTF value, a dot does not fl uorite lenses in 1969 and the sharpness, or the clarity test chart used. The number ,, come to a fo cus or im age as highlights am ong marketed them. These were of picture im:ages are often of black lines in the test chart ~ , a dot in the periphery of the photojournalists. t he FL-F300mm f/5.6 ~, .. ,, examined. What is, is converted into a spatial , , image plane. As a result , the (see photo) and the s ha rpn~ s? Sharpness frequency. By measuring the .'---- obtained image may be a involves the follow ing lens amplitude, or the MTF value, --- rad iating highlight, a qualities: resolving power and at each spatial frequency, 0 • ,. doughnut-shaped contrast. Resolving power is sharpness ca n be determined. Resolution (spatial frequencyfmm) the ability of a lens to precisely reproduce fin e Opliul axis detail from the su bject; To determine the image contrast contributes varied Two MTF curves indicate lens form ing performance at a _ . levels of shading or density to performance with respect to point distanced from th~ the subject picture. The two directions of test optical axis on the image incorporation of both patterns. The first curve plane, it is necessary to take qualities is a prerequisite for (drawn using a dotted line in both meridional and sagittal Pencit o f r.YI in sagillal plane any high-performance lens. the graph below) indicates test patterns into -- Pencil of rays in meridional plane To determine lens sharpness, the meridional resolving consideration. The former a method called the MTF power for a test pattern and the latter pattern s are F L·F500mm f/5 .6. In 1973, (Modulation Transfer drawn tangential to the drawn tangential 10 and The excellent o pt ical Ca non added the FL300mm Function) is employed which circumference while the normal to a circumference, Although fluorite has been chara cteristics of fluorite f/2.8 " FLUORIT E" to the uses test charts consisting of second curve (a solid line) respectively, which shares the known as an excellent lens for compensating for new product series. The lens' black and white lines drawn indicates Ihe sagittal resolving optical axis as its centra l material from early times, it chromatic aberration were high optical performance alternately and equally power for a test pattern axis. MTF measurements are took many years before it known as early as the 18oos. and excellent color spaced within spaces of I mm . drawn perpendicular 10 the Meridional resolvinl power curve came to be used in Since fl uorite was obtainable reproduction capabili ty won A number o f charts are circumference. - Salillal resolvinl power curve photographic lenses. Two only as nat ural crystals, only photojournalists' high praise. available, each with a different .. major obstacles were the small fluorite elements had The current lotal of seven number of lines (I to 100 sam .. f/ I .4 y-IO difficulty in growing large­ bee n used in small optical ultrahighllerformance lenses, lines) drawn within such I mm Meridional size artificial fluorite crystals lenses such as microscope characterized by the use of spaces. These charts are leSI panern and the other, high objectives. In later years, in fluorite or UD elements or photographed using a lens Salinal ---- production costs. Canon the 1920s, technological both, in the L-series have test pattern ------being evaluated. The lens' began marketing its first advancements made it been developed using Canon's reproduction capabilities, o • ,. two fluorite lenses as early possible to grow artificial lIlany years of comprehensive derived from an MTF test, Spatia! frequency (number of linesfmmj :as in 1969. crystals and paved the way optical engineering.

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FD 14mm f/2.8L FO 241010 r/1.4L FD SOmm f/1.2L

Ft> 300mm [j4L FD 300mm f/2.8 L FD 400mm f/2.g L

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FD 800mm f/S.6L FD SOOmm f/4.S L

FD 20-3Smm r/3.S L FD SO·300mm f/4.SL

FD lS()'{)OOmm (IS.6L FD14mm f/ 2.8L FD24mm f/ 1.4L ASPHERICAL ASPHERICAL

This lens can be called a "true" reproduction distortion·free. Distance scale: This epoch-making wide-angle lens under relatively poor lighting Coating: S.S.C.· super wide-angle lens since it Spherical aberration is virtually (m) 0.25 (magnification 0.099x) boaslS an extremely large maximum conditions where the uSC o f flas h is Angles of view: Diagonal : 84 ~ features such a large maximum non-existant while excellent to 2, and inimity aperture of f/ l.4 for ilS focal not possible. The lens has, thus, Vertical: 53° aperture of f/2.8 for its extremely sharpness remains. Despite the lens' (ft.) 0.9 to 7, and infmity length, which is made possible drastically expanded the horizons Horizo ntal: 74° short 14mm focal length. It has a large maximum £/2.8 aperture, its Foeusing: Helicoid thro ugh the incorporation of an for wide-angle photography. Barrel ­ Distance scale: 0 diagonal angle of view of 114 - optical syslem is remarkably Minimum aperture: f/ 22 aspherica1 element. With regular form distortion inherent in (m) 0.3 (magnification 0.12x) to more than twice that of a SOmm compact. Canon's Floating System Aperture type: Full y automatic spherica1lenses, it is not possible to spherical wide-angle lenses and 3, and infmity standard lens (46°) and nearly elimmates aberrations at close Filter: Ge latin filter holder completely eliminate flare which comae are almost entirely absent. (ft.) I to 10, and infinity twice thai ofa 35mm/lens. (63°) shooting dislances and ensures Hood: Permanently attached usually increases with aperture size The lens orrers excellent contrast as Focusing: Helicoid The lens is constructed of 14 edge-tcredge sharpness tluoughout Length and max. diameter: and becomes most obvious at wen as the extremely high image Minimum aperture: f/ 16 eiemenlJ configured into 10 groups. the entire focusing range. 83.5mm x 74mm maximum aperture settings. The definition which is characteristic of Aperture: Fully automatic In particular, iU second element is Weight: SOOg aspherical element has virtually aspherica1lenses. Because of its Filter diameter: 72mm aspherical having an extremely high Focal length: 14mm eliminated flare while, at the same relatively moderate distinctive Hood: BW-72 degree of curvature on its front Aperture ratio: 1:2.8 time, enhancing the resolving power perspective making fo r easy Length and max. diameter: surface. This element almost Lens constIU ction: 14 elemenu in and solving the problem of framing, the lens enjoys a solid 68mm )( 76.5mm completely eliminates the 10 groups diminishing brightness at the reputation as an easy-to-usc Weight : 4308 distortion that usually is (including I aspherical element) periphery of the image field, a wide-angle lens. O ose-up shooting characteristic of super wide-angles Coating: S.S.C.· shortcoming of conventional down to a minimum working and is extremely difficult to Angles of view: Diagonal: 114° spherical lenses. As a result, the lens distance of 30cm is possible. correct. The unique aspherical Vertical: 8 1° is free from halo (often appearing element renders normal image Horizontal: 104° in nighttime snapshots as blurred Focal length: 24mm outlines of light sources such as Aperture ratio: 1:1.4 lighted windows, street lights, etc.). Lens construction: This improvement makes it possible 10 elemenU in 8 groups to shoot available-light photographs (including I aspherica1 element)

•

FD50mm f/ 1.2L FD85mm f/1.2L ASPHER ICA L ASPHERICAL

This iAeries standard lens leads all leru ensures quality images under a Distance 5Cale: Using an aspherical element in its range. An especially striking feature Coating: S.s.C.· other standard lenses in optical broad range of shooting conditions (m) 0.5 (magnification 0.13x) to second lens group, this extremely of this lens is its high optical Angles of view: Diagonal : 28° 30' performance. Des pite iU extremely and situations. Color balance is 30, and inimity high-speed short-telephoto lens performance even at maximum Vertical: 16° large f/ 1.2 maximum aperture, the stringently adjusted through the (fl.) 1.15 to 30, and infmity fea tures an outstanding maximum aperture. Crisp, halo-free and Ho rizontal:24° lens is compact in design and optimal selection of glass elemenu Focusing: Helicoid aperture for a lens of this focal flare-free high-contrast pictures can Distance scale: em) 0.9 I we ighs a mere 380g. An aspherical and unique combinations of various Minimum aperture: f/16 length. A very distinctive feature of be obtained at any of the aperture (magnification O. t2x) to 10, and element makes the lens virtually kinds o f coatings. A multi-layer Ap erture: Fully automatic a quality short focal length se ttings. This lens is also one of the infinity (ft.) 3 to 30, and infinity flare less which is inherent in coating provides high transmission Filter diameter: S2mm telephoto le ns is its ability to create illSt short telephoto lenses to Focusing: Helicoid conventionallarge-aperture coefficients and minimizes ghost Hood: BS-52 a crisp image of the subject with employ a "floating system" which Minimum aperture: f/ 16 spherical lenses and which becomes images. Le ngth and max. diameter: both fo reground and background minimizes aberrations at close Aperture: FuDy automatic most obvious at maximum aperture SO.5mm x 65.3mm aesthetically diffused at the shooting distances. This permits the Filter diameter: 72mm setting.!:. The lens' large maximum Focal length: 50mm Weight; 380g maximum aperture setting. nus lens high aspherica1lens performance to Hood: BT-72 aperture makes it possible to Aperture ratio: 1:1 .2 characteristic has been further be maintained even at sho rt Length and max. diameter: produce high-eontrast images even Lens construction: enhanced by the use of an aspherical camera-to-subject distances. 71mm x SO.Smm under roor lighting conditions. 8 elements in 6 groups (including element. Using Ca non's advanced Overall, this has become one of the Weight: 680g Canon s Aoating System o ptimizes I aspherical element) optical engineering, the favorite lenses used by optical performance by minimizing Coating: S.S.C.· near-ultimate in aspheri cal element discriminating professional -­, • aberrations over the entire focusing Angles of view: Diagonal: 46° shape has been achieved. This, photographers. '" •• " . . distance from the closest working Vertical: 27° together with a unique combination • .- ., distance of 0.5m to infinity. The Horizontal: 40° of other elements of the lens Focal length: S5mm •• - produced from the most su itable Aperture ratio: 1:1.2 types of optical giass, delivers Lens construction: •• exceUent resolving power S elements in 6 groups (i ncluding •• ... ~. - throughout the entire aperture I aspherical element) • I ':1 • • • --.~

·S.S.C.: Super Spect .. Coa ting FD300mmf 4L FD300mm f / 2.8L U LTRA ..;L;.;O;..W....;;..;....; FLUORITE +ULTRA LOW D ISPERSION(UD ) G LASS

Thls large-aperture telephoto lens focusing system enSllres light and 50, and infinity The use of fluorite and UD gla ss spherical aberration, comae, (ft.) 10 to 200, and inl'inity has one of the favori te focal lcnglhs smooth focusing. This system (£1.) 10 to 200, and infmity elements has made possible this astigmatism and other aberrations Minimum aperture: f/32 and incorporates two UD elements incorporates a vari-pitch focusing Focusing: Rear group high-performance telephoto lens are eliminated resulting in high Aperture: Fully automatic made of a new 0l?tical material cam which provides easy focusing Minimum aperture: f/32 which features a large f/2.8 resolving power ~ the maximum Filter: Drop-in type (for 4 8mm called "UD glass' . This lens throughout the entire shooting Aperture: Fully automatic maximum aperture. The second f/ 2.8 aperture. Focusing is rendered diameter filters) incorporates some of the excellent range by gradually decreasing the Filler: lens element is a fluorite element, easy by Ca non's rear group focusing Hood: optical characteristics of a fluorite focal shift as focusing approaches Drop-in type <34mmodiameter which offers such superior optical system, van·pitch cam system and Built-in (The EH·123 extens.ion lens. Measuring 207mm in overall infmity. This provision is especially dedicated-type filters) characteristics as a low refractive one-touch revolving mount. hood can also be attached.) length and weighing a mere I,010g, useful for hand-held shooting. Hood: Built-in type index, low dispers.ion and Tripod mount: Built·in the stimmed-down design makes Tripod mount: Detachable mount anomalous dispersion. The third Focal length : 300mm Length and max. diameter: hand-held shots almost child's play. Foca1lcngth: 300mm Length and max. diameter: element is of UD glass, which Aperture ratio: I :2.S 245mm x 127mm The front section in cludes two UD Aperture ratio: 1:4 207mm x 85mm features some of the properties of Lens construction: 9 elements in Weight: 2,34 5g glass elements, which like fluorite Lens construction: Weight : 1.070g fluorite lenses. These two elements 7 groups (including I UD glass elements, suppress the secondary 7 elements in 7 groups (including - are optimally combined to suppress element and 1 fluorite element) spectrum and minimize chromatic 2 UD glass elements) secondary spectrum and chromatic Coating: 5.S.C.· aberration, this latter condition is a Coating: S.S.C.- aberration problems which occur in Angles of view: Diagonal: 8" 15' major factor reducing picture Angles of view: Diagonal: SOlS' .. telephoto lenses of this focal Vertical: 4°35' quality. As a result, high·contrast Vertical: 4°35' lcngth. The striking feature of this H orizonta1 : 6~ 50' sharp edge-Io-edge images are Horizonta1:6° 50' .. le ns is its extremely high resolving Distance scale: assured over the entire im age field. Distance scale: "C.7. +-+-t--H power across the entire image field. (m) 3 (magnification O.llx) to The adoption of Ca non's rear group (m) 3 (magnification 0.11 x) to Common aberrations such as 50, and inrmity , .. , --~ ­

FD400 mm f/2.8L FD500mm U LTRA LOW D1SP F L UORITE+ULTRA LOW

• 1ltis f/2.8 iens has an extremely system; thus, stable camera balance (ft.) 15 to 200, and infinity This lens incorporates a UD glass uniform focus ove r the entire image Focusing: large maximum aperture for its can be maintained . By combining Focusing: Rear group and a fluorite element to reduce the plane. Wi th a 0.82 telephoto ratio Rear group focusing system 400mm focal length. This is a lens the rear focusi ng system with a Minimum aperture: fl3 2 secondary spectrum to a minimum. the lens is both compact and Minimum aperture: f/32 photojournalists prefer because of vari-pitch focusing system, the lens Aperture; Fully automatic Superio r results are readily lightweight. Focusing adjustments ApertUre: Fully automatic its bright image fie ld , fast speed, focusing is extremely simple. Filter type: Drop-in type (for apparent; high-contrast are made extremely easy by Canon Filter type: Drop-in type (for 48mm compact design and excellent 48mm diameter mters) high-dermition pictures are free fear focusing combined with the diameter mters) operability. Typic-al subjects are Focal length: 400mm Ilood: . from flare and halos. Spherical van·pitch focusing system. . (The EH-123 athletes whose rapid movements Aperture ratio : 1:2.8 diameter: aberrations, comae and astigmatism hood can also be attached) can be vividly caplllred even under Lens construction: mon are prevented b y a 3~lement, Focal length: 500mm mount: Built-in poor lighting conditio ns such as 10 elements in 8 groups convex-<:oncave-convex Aperture ratio: 1:4.5 and max. diameter: shortly before sunset. Two UD glass (including 2 UD glass elements) conrl8uration in the first lens Lens construction : ~m! 128mm elements are employed to minimize Coating: S.S.C.- section. In the convex lens 7 elements in 6 groups (including 2,6 10g the secondary spectrum and to Angles of view: Dmgo na1 : portion UD glass and fluo rite 1 UD glass element and 1 achieve high-co ntrast pictures with Vertical : elements are used, which have low flu orite element) excellent color reproduction at any Horizo ntal: refractive indexes. These elements Coating: S.S.C.- aperture. During focusing, the Distance scale: maintain a curvature of field at Angles of view : Diagonal: 5° overall lens length is held constant (m) 4 (magnification.0.115x) to minimum levels and thereby Vertical: 2°4 5' by Canon's rear group focusing 50, and inrmity .,ttt!= significaUy enhance the dermition Horizontal: 4° on the periphery of the image field . Distance scale: (m) 5 (magnification -- The subject can, therefore, be 0.1 4x) to 50, and inrInity brought into extremely sharp, (ft.) 20 to 200, and inrmity

· S.S.C.: Super Spec! .. COllina FD800mm f/ 5.6L FD20-35mm f/ 3.5L ULTRA LOW DISPERSION(UD) GLASS AS PH ERICAL

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This lens has the langelt focal glass element. The unique 100, and infinity Tltis zoom lens combines the focal two-group zooming system not length and 0.08x magnification length of any in the Canon !Aeries conrlgUration of glass elements (ft.) 45 to 300, and infutity range of four fixed foca1length only has enabled a diminished at 35mm) to 3, and infl.llity of FD interchangeable lenses. Its Cully compensates fOI field Focusing: lenses : 20mm, 24mm, 28mm and lens size but also compensates (ft.) 1.75 to 10, and infmity d.ia,;onal angle of view is extremely curvature. This is one of a new Rear group focusing system 35mm. Although its zoom ratio for aberrations which would Zooming: Rotary zoom ring 0 narrow, about 3 • The lens has a seneration of super telephoto lenses Minimum a~tUIe; fl 32 appean relatively .small, it hu olherwise arise during zooming. Minimum aperture: f/22 magnification 16 times that of a which delivers superb, consistent Aperture: Fully automatic enormous expressive potentiality as Aperture: Fully automatic SOmm standard lens and can fill the optical results over the entire image Fil ter: Drop-in type (for 48mm the actual visual spread is Filterdiameter: 72mm 35mm viewin$ frame wi th an aIea field. diameter mIen) SUbstantial. The aspherica1 surface Focal length: 2Q-35mm Hood: BW·72 that is o nly I/2S6th the size of the Tripod mount: Built-in of its first clement eliminates barrel Aperture ratio : 1:3.5 arca covered with the SOmm lens. Foca11ength: 800mm Length and max. diameter: distortion at short focal lengths. II Lens construction: It incorporates Canon's unique rear Aperture ratio: 1 :5.6 577mm x IS4mm also assures uniform brightness over 11 elements in II groups group focusing system in which Lens construction: Weight: 4.2708 the entire picture field , even al (including 1 aspherica1 element) focusing is performed by limiting 7 elements in 6 groups (including "--'-TO short focal lengths, and produces Coating: S.S.C.- the movement 10 the rear lens 1 UD glass element) -c-- crisp edge-to.wge pictures, A Angles of view: group. The overall le ngth of the Coating: sse.· movable flare stopper, not found in Diagonal: 94° _ 63° lens remains unchanged during An~es ofnew:~n~: conventiona1lenses, is incorporated Vertical: 62° _ 38° focusing, thereby the maintaining Vertical: to block skew rays which could Horizontal: 84° _ 54° excellent balance over its entire Horizontal: normally increase towards short Distance scale : (m) 0 ,5 (0.05x shooting range. The secondary Distance scale: le ns foca1 lengths. Canon's unique magnification at 20mm fo cal spectrum is minimized by a UD (m) 14 (magnification O.06x) to

FD50-300mm f/ 4.5L FD 150-600mm f/ 5.6L ULTRA LOW DISPERSION(UD) GLASS ULTRA LOW DISPERS ION(UD) GLASS

This lens zooms from standard to Foca1length: SO - 300mm compensation system (Focusing 11ti.s lens zooms from 150mm to compensate for chromatic Zoom system: full-scale telephoto including the Aperture ratio: 1:4.5 using a sepazate focusing ring) 600mm, reflecting a high zoom aberration. Linear slide zoom/ focusi[lg knob most frequently-used foca1lengths. Lens construction: Minimum aperture: f/ 32 ratio of 4. Its 600mm setting is the includes a mechanical aberration With its 6-power zoom ratio, the 16 elements in 13 groups Aperture: Fully automatic longest focal length of any zoom Focal length: ISO - 600mm compensation system lens can satisfactorily cope with (including 2 UD glass elements) Filter: lens currently available. The zoom Aperture ratio: 1 :5.6 Minimum aperture: f/32 most action situations. Despite the Coating: 5.S.C.- Drop-in mter (34mm diameter) employs a unique inner focusing Lens construction: Aperture: FuUy automatic high zoom ratio of the lens, its Angles of view: Hood: S-100 system. It involves a maximum 19 elements in I S groups Filter:Drop-in mter(34mmdiameter) telephoto ratio is belo w one to Diagonal 46° - 8° 15' Length and max. diameter: displacement of only 33.8mm o f (including 3 UD glass elements) Hood: Built·in achieve a reduced overall length and Vertical 27° - 4°35' 250mm x l 04mm the lens group providing the Coating: S.S.C.- Length and max. diameter: compact design fo r enhanced Horizontal 40° - 6° SO' Weight : 1,820g focusing effect for the entire Angles of view : 468mm x 123mm operability. The lens's maximum Distance scale: (m) 2.5 (0,025x shooting range, The lens has Diagonal 16° 20' _ 4° 10' Weight: 4 ,260g aperture of f/4.5 is the largest of magnification at 50mm focal excellent operability due largely to Vertical 9° 10' _ 2° 20' -...... - any in the same focal range. Two length and 0.144x magnification ~~- - ~ this unique optical design. In Horizontal 13°40' _ 3° 30' UD glass elements maintain the at JOOmm) to 30 , and infmity addition , both focusing and secondary spectrum at minimum (ft,) 8 to 100, and infinity zooming are performed using the levels for S\l~erior optical results Zooming system: ~ same knob to further increase over the entire focal length range Rotary lOOm ring includes a operability. The large f/5.6 .. -1-+--f'-..1oI and at all shooting distances. mechanical aberration maximum aperture is provided by .. :-;:I-+-+--R three UD glass elements which -- ' . .. .. --.. _ L--t--i~!C::-:i~

· S. S.c.: Silper Specln Co.tinl I" ! •

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