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MIL-STD-150 Rev. A

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MIL-STD-150 Rev. A Downloaded from http://www.everyspec.com M!L-STD-UOA 12 My 19s9 SUPERSEDING MK-STD-I 50 23 Cktdaor 1954) MILITARY STANDARD PHOTOGRAPHIC LENSES ( ------ .- . ......... .. Downloaded from http://www.everyspec.com \. MlL-STD-l SOA T2 May 1?59 f- ARMED FORCES SUPPLY SUPPORT CENTER WASHINGTON 25, D. C. Photographic Lenses MHXTD-150A 1. This standard has been approved by the De~artxnent of Defense and k mandatory for use by the Departments of the AmYY, the Na~, and the Air Force, effective 12 May 1959. 2. In accordance with established procedure, the Signal Corps, Bureau of Aeronautics, and Air Force have been designated as Aimy-Navy-Air Force custiians of this standard. 3. Provisions of this stindard are the subject of international stand- ard~t.ion agreement When revision or cancellation of this standard is proposed, the departmental custodians will inform their respective De paxtmental Standardization Oflices so that appropriate action may be taken respecting the international a~eement concerned. 4, p,ee~mtimegd~- CWV@ion ~. gd~itinn~, or dekt.iong should be ad- dressed to the Standardization Division, Armed Forces Supply SuppOti Center, Washington 25, D. C. Downloaded from http://www.everyspec.com MLSIW1 50A 12 Muy ?9s9 L SCOPE . ......................................................................................................................... 1 1.1 PURPOSE ........................ ........................ .............. .................................................. 1 1.2 CLMHF: CATION ................................................................................................... 1 Types of Lenses ......................................................................... ........................... 1 Type I — Aerial Recormaissance .................................... ................................ 1 Type II — Aerial Mapping ........... ... .............................................................. 1 Type III — General Photographic ............ ...................................................... 1 Typerv-Process ...................................................................... ...................... 1 Typev — Motion Picture Camera ................................................................. 1 TypevI — Enlarger ......................................................................................... 1 Type VII — Projection ................ ...... ........ .................................................... 1 T@ VIII — Photomicrographic .... ..................... ................. ...................... 1 Type IX — Portrait ............... ... ............................. ........................................ 1 Typex — View%nder ....... ........ ...................................................................... 1 Type XI — Condenser ....................................................................................... 1 ~ XII — copying ....................".. ................................................................ 2 Type XIII — Microphotc)gmphic .. .................................................................. 2 Type XIV — Recording ............. ..... .... .......................................................... 2 2. REFERENCED DOCUMENTS ..... ............................................................................. 2 21 NOT APPLICABLE ... ... ............. .. ................ ............................................ 2 3. DEFINITIONS ............................................................................................................... 2 3.1 AXES, POINTS, AND DISTANCES .......................... ......................................... 2 3.1.1 Optical axis ..................................... .................................................................... 2 US Axis of beat definition ............................ .............................................................. 2 3.121 Plane of best definition ...........................— ........................................................... 2 3.1.2.1.1 Plane of best average definition over the picture area .... .................................................................................... 2 3.1.2.12 Field tilt ................................................................................................................... 2 3.122 Best principal focus ............................................................................................... 2 $.1.3 IKdanicd axis ....................................................................................................... 3 3.1.3.1 Flange tilt ............................................................................................................... 3 8.1.8.2 Plane of the receiver ............................................................................................... 3 3.1.23.1 Focal tilt ................................................. ........... ................................................... 3 3.1.4 Equivalent focal length ......................................................................................... 3 3.1.6 Calibrated fod length ........................................................................................... 3 $.1.6 Back focal distance .......................................................................................... ...... 3 8.1.? Flange focal distance ............................................................................................. 3 3.1.8 Front focal distance ............................. .............................................................. 3 3.1.9 Front werkbari focni distance ....................... ............ ............... ........ 3 S.1.lo Telephoto ratio . .... .. ...... 4 fil Downloaded from http://www.everyspec.com MI1-Sl’&l sOA 12 Moy 1959 Pap. 3.1.11 Depth of focus and depth of field ................ ........................................................ 4 32 APERTURE AND RELATED QUANTITIES ................-..”----------------...... ........... 4 32.1 hns Speed ..................... ................................... .. ............................... ................... 4 322 Aperture ratio .......................................” ........ ........... ....... ......... .. .... .............. 4 323 Effective aperture .................... ............................... .............................................. 4 %2.4 Chx aperture .......... ...................................."....""""."""."."."."."""..."".......................... 4 32.5 Relative aperture ................................................................ .............. ................... 5 32.5.1 f-number ...................................................—. ....... ............................ ................... 5 32.6 T-stop and T-number ............................................................................................. 5 32.6.1 Area weightd average T-number ....................... .. .-... —.......... ........... ....... 5 3.27 Front operating aperture ............................................................ ........................ 6 328 Rear operating aperture ...............-...”.......— ...................................................... 6 8.3 CONSTRUCTIONAL FEATURES .... .... ....................... ........................................ 6 33.1 Optical system ............ ........ .....................s ...."""".""...."........""".....""".".."""........."".... 6 332 Member ................................................ .. ...............-—.-. ...................................... 6 3.33 Component . ........... .. ... .. ...............--- ...........--..--.-= -"""---............... ..... ............. 6 3-3.4 Element .............. .........-.$-------------. ............... .... ...... ... ........ ........ .. .................. 6 3.3.5 Front of photographic lens ......................... ......................................................... 6 32.6 Back of phO@T8phlC ha ..-.....—.-----.-.=--------.......... .. ................. ..................... 6 3.3.7 Name of design . .................... ... ...... .................................................................... 6 3.3.8 Telephoto .......................................................... ..................................................... 6 3.3.9 Glass ~ ...... ...................... ......... ................"....a.."""."...".".. "".."..".. "."""...".""....." 7 ........................... .. .......... 7 3.4 MECHANICAL AND STRUCTURAL FEATURES ~ 3.4.1 Ceil ................... ........................................ ......................................... .. ...... ...... 3.42 Barrel ......................................................................... ............. .......... .... ............. 7 3.4.3 Cone ............. ................ ... ........................................ ....................... ................... 7 3.4.4 Lens diaphmgm ............................................................ .................... .. ............... 7 3.4.5 Iris diaphra~ control ............................................ .......................... ................ 7 3.4.6 Parfocalized ......................................................................................... ................... 7 3.4.7 Spanner wrench openings .. .................................................................................. 7 ‘7 3.5 FIELD OF VIEW ..................................................................................... ................... 3.6 OPTICAL C~ARA-bxsTICS ...............................................................................-.
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