70.87 mm
Flange focal distance
1984
Introduced
SLR
System type
0
Lenses in our database
Mount facts#
- Mount
- Pentax 645
- Maker
- Pentax
- Type
- SLR
- Flange focal distance
- 70.87 mm
- Formats
- 6×4.5 cm & 44×33
- Electronic contacts / AF
- Yes
- Production
- 1984–
About the Pentax 645#
Medium-format mount of the 645N and 645D/645Z.
Pentax 645 cameras#
Adapting basics#
A lens can be adapted with simple tube spacers when its flange distance is longer than the camera's. With 70.87 mm, Pentax 645 lenses can in principle go on bodies with shorter flanges such as Zenza Bronica ETR, Contax 645, Mamiya 645, Novoflex [de] A-mount, Ricoh 126C-Flex, Hasselblad H. Bodies with this mount can take lenses from longer-flange systems such as Rollei 6×6 (SL66/SLX), Pentacon Six, Hasselblad V, Kowa Six/Super 66, Kiev 88 / Salyut, Hasselblad 1000F & 1600F, Pentax 6×7, Zenza Bronica SQ.
Sources & licences#
- Wikipedia: Flange focal distance — CC BY-SA 4.0
- Lensfun mount compatibility data — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources