Pentax-A 645 SMC 300mm F/4 ED [IF]

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

Summary02

Pentax-A 645 SMC is a 300mm f/4 telephoto lens for Pentax 645 medium-format cameras, intended for subjects at distance such as portraits or sports.

AI-assisted summary — verify against linked sources

Specifications from cinelenswiki

Where can this lens be adapted?

The Pentax 645 mount has a flange distance of 70.87 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Pentax 645 DA lenses have no aperture ring. Use an adapter with its own aperture control.

Sony EAdapter · 52.87 mm
Canon RFAdapter · 50.87 mm
Nikon ZAdapter · 54.87 mm
Fujifilm XAdapter · 53.17 mm
L-MountAdapter · 50.87 mm
Micro Four ThirdsAdapter · 51.62 mm
Fujifilm G (GFX)Adapter · 44.17 mm
Canon EF-MAdapter · 52.87 mm
Canon EFAdapter · 26.87 mm
A rear element that sticks out can hit the camera mirror.
Nikon FAdapter · 24.37 mm
A rear element that sticks out can hit the camera mirror.

Sources03

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Other Mounts03

No alternate mounts are indexed for this family yet.