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Datasheet-Zeiss-Biogon-4538-Cf-En Biogon@ T* 4.5/38 CF 34.5to film @ co -~! -- I I i 80 HASSElBlAD 90 degrees angle of view, a focallenght only half the The famous Hasselblad Superwide Camera SWC, the '" diagonal of the film frame, produced with an almost state-of-the-art wide angle device in medium format für symmetrie lens design of surprising compactness, almost 50 years and the premium choice für these who featuring the typical advantages of symmetricallens demand the utmost in wide angle performance on designs: distortion is very weil controlled, and so is earth - or in space. @ color correction and image fjeld flatness. Combined The Hasselblad SWC with the Biogon T* 4.5/38 CF is with extreme precise manufacturing these properties a powerful and fast tael für architecture, demanding make für an outstanding wide angle optic with high interiors, documentation, industrial photography. resolution, an excellent documentention tael. This is Combined with current high resolution films the SWC exactly wh at is needed in aerial mapping photography, and the Biogon can easily replace view cameras in a fjeld where Carl Zeiss has played a leading roje many situations: It is much faster, sm aller, more worldwide für alm ost a century, hence the expertise to convenient (no cassette loading in the dark!) and more design and manufacture such an outstanding portable; film and processing are much more high-performance jens like the Biogon. SinGe the last economic. With the focusing screen adapter 41057 vertex is located only 18.8 mm away from the film precision focusing is possible down to 20 cm in front of plane, no viewfinder-mirror can be used between the lens. Biogon and film. @ Preferred use: architecture, demanding interiors, So Biogon lenses cannot be used with SLR type industrial, documentation, aerials, travel, high quality cameras. On the ether hand is the performance of the snapshots @ Biogon so outstanding, that this Jens is worth a camera body of its own: '" ---------------------------------------------------- Cat. No. of jens 104867 Number of elements 8 Glose limit fjeld size 266 mm x 266 mm Number of groups 5 Max. scale 1: 4.7 Max. aperture f/4.5 Entrance pupil Focallength 38.6 mm Position 21.7 mm behind the first jens vertex Negative size 55 x 55 mm Diameter 8.6mm Angular fjeld width 72', height 72', Exit pupil diagonal 91' Position 21.6 mm in front of the last jens vertex Min. aperture 22 Diameter 9.1 mm Camera mount SWC Position of principal planes Filter connection bayonett, series 60 H 23.5 mm behind the first jens vertex Focusing range infinity to 0.3 m H' 19.9 mm behind the last jens vertex Working distance (between mechanical front end of Back focal distance 18.8 mm jens and subject) 0.2 m Distance between first and last jens vertex 76.2mm ------------------------------------------------------------- Performance data: Biogon@ T* 4.5/38 CF Cat. No. 10 48 67 1. MTF Diagrams Modulation transfer T as a functlon of image height u. 51itorientatlon: tangential --- sagittal- The image height u - calculated fram the White light. 5patial frequencies R = 10, 20 and 40 cycleslmm image center - is entered in mm on the T f-number k = 4.5 T f-number k ~ 8 horizontal axis of the graph. The 1.0 1.0 modulation transfer T (MTF = M odulation Transfer Factor) is entered on 0.8 0.8 the vertical axis. Parameters of the ~..:::: ;.~>,,<.. -- graph are the spatial frequencies R in , ,: : cycles (Iine pairs) per mm given at the 0.6 ...,....:, top of this page. , ,. The lowest spatial frequency '- 0.4 0.4 . , corresponds to the upper pair of curves, , ~.. '~ ., the highest spatial frequency to the lower : ~ pair. Above each graph, the f-number k 0.2 0.2 ... is given tor which the measurement was made. "White" light means thai the 0.0 0.0 ~ measurement was made with a subject 0 10 20 30 4C 0 10 20 30 40 illumination having the appraximate u [mm] u [mm] spectral distribution of daylight. Unless otherwise indicated, the E Relative illuminance v Distortion in % of image height u 1.0 2.0 performance data rater to large abjaGt distances, tor which normal 1.0 '" photographic lenses are primarily used. 0.8 0.0 2. Relative iIIuminance 0.6 In this diagram the horizontal axis gives -1.0 the image height u in mm and the vertical axis the relative illuminance E, 0.4 -2.0 both tor full aperture and a moderately 0 10 20 30 40 u [mm] stopped-down jens. The values tor E are determined taking into account 0.2 vignetting and natural light decrease. 0.0 3. Distortion 0 10 20 30 40 Here again the image height u is entered u [mm] on the horizontal axis in mm. The vertical axis gives the distortion V in % of the relevant image height. A positive ~ value tor V means thai the actual image point is further fram the image center than with perfectly distortion-free imaging (pincushion distortion); a negative V indicates barrel distortion. Subject to change. Printed in Germany 25.05.2000 Carl Zeiss Photoobjektive ZEISS 0-73446 Oberkochen Telephone (07364) 20-6175 Fax (07364) 20-4045 eMail: [email protected] http://www.zeiss.de.
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