N°110031 · Family detail
PentaxZoom·PENTAX 645 mount·1995
Smc Pentax-A 645 45-85mm F/4.5
Specifications01
MountPENTAX 645
Focal length45-85mm
Max aperturef/4.5
TypeZoom
Release year1995
Weight805 g
Filter size77 mm
Min focus distance0.5 m
Max magnification0.2198
Aperture blades8
Optical elements11
Groups9
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings + Auto Exposure setting)
Lens hoodScrew-type RH-RD77 (round)
TeleconvertersPentax Rear Converter-A 645 2X→ 90-170mm F/9
EraPro
Production statusFilm era
Additional Info02
Lens TypeStandard zoom lens
Summary02
Pentax 645 SMC A-mount zoom lens with a 45–85mm focal range and maximum aperture of f/4.5, intended for general-purpose medium-format photography.
AI-assisted summary — verify against linked sourcesWhere 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.
Other Mounts03
No alternate mounts are indexed for this family yet.