N°94970 · Family detail
PentaxZoom·PENTAX 645 mount·2002
Smc Pentax-FA 645 55-110mm F/5.6
Specifications01
MountPENTAX 645
Focal length55-110mm
Max aperturef/5.6
TypeZoom
Release year2002
Weight500 g
Filter size82 mm
Min focus distance0.8 m
Max magnification0.16
Aperture blades8
Optical elements9
Groups9
AutofocusYes
StabilizationNo
Aperture controlAperture ring (Manual settings + Auto Exposure setting)
Lens hoodBayonet-type PH-RBB82 (petal-shaped
With filter access window)
Teleconverters●Pentax Rear Converter-A 645 2X→ 110-220mm F/11.2
EraFilm era
Additional Info02
Lens TypeStandard zoom lens
Summary02
Pentax 645 SMC FA medium-format zoom lens for the PENTAX 645 mount, with a 55–110mm focal range and maximum aperture of f/5.6, intended for general telephoto/standard use (including portrait and travel).
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.