N°109490 · Family detail
PentaxTelephoto·PENTAX 645 mount·1984
Pentax-A 645 SMC 300mm F/4 ED
Specifications01
MountPENTAX 645
Focal length300mm
Max aperturef/4
TypeTelephoto · Prime
Release year1984
Weight1360 g
Filter size77 mm
Physical length208 mm
Min focus distance3 m
Max magnification0.1099
Optical elements8
Groups8
Min aperturef/32
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings + Auto Exposure setting)
Lens hoodBuilt-in telescopic round
TeleconvertersPentax Rear Converter-A 645 1.4X→ 420mm F/5.6
Pentax Rear Converter-A 645 2X→ 600mm F/8
EraFilm era
Production statusDiscontinued
Additional Info02
Model645 SMC
Format645 film
SeriesPentax-A
Squeezenone
Lens TypeMedium telephoto prime lens
Data Protocolnone
Focus Zoom Rodnone
Front Diameter Mm93
Field Notes02
Pentax 645 SMC A* 300mm f/4 ED [IF] is a fixed focal-length telephoto prime for Pentax 645 medium-format cameras, intended for subjects at distance with relatively bright aperture. The IF designation indicates internal focusing.
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Other Mounts03
No alternate mounts are indexed for this family yet.