Table of Contents
Mamiya-Sekor C 75–150mm f/4.5
Summary
Tech Specs
| Manufacturer | Mamiya-Sekor |
| Series | 645 Zoom |
| Model | C |
| Focal Length | 75–150mm |
| Max Aperture | f/4.5 |
| Min Aperture | f/32 |
| Format | 645 |
| Image Circle | - |
| Minimum Focus | 71 in. |
| Focus Rotation | - |
| Iris Blades | 8 |
| Optical Design | 11 / 10 |
| Squeeze | n/a |
| Front Diameter | n/a |
| Filter Thread | 77mm |
| Focus/Zoom Rod | n/a |
| Native Mount | Mamiya 645 |
| Data Protocol | n/a |
| Length | 4.5 in. |
| Weight | 975g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | Manual |
| Iris Drive | Manual |
| Zoom Drive | Manual |
History
Country of Origin: Japan
Release Date:
Launch Price:
Design Revisions:
Service
This section restricted to Duclos Staff users.
Service Manual: (Insert link to manual here)
Full CLA: #hrs.
Enter relevant notes here
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Cine-Mod
This section restricted to Duclos Staff users.
Focus Ring O.D.:
Zoom Ring O.D.:
Iris Ring O.D.:
De-click Y/N:
Additional Notes:Iris gear is possible but not generally recommended since the surface area is very slim, the gear will cover the stop numbers (unless a custom segmented gear is made and attached via screws into the iris ring) and the iris rings on some Mamiya-Sekor lenses, specifically the C N variants, is plastic, which can flex. Generally, iris rings on the C versions are aluminum, while the iris rings on the C N versions are plastic. The quickest way to distinguish between a C and a C N variant (besides, of course, looking at the engraved serial ring — the C will always be green, while the N will be white) is the texture of the rubber focus grip. If the grip has a diamond texture, it is a normal C version. If the grip has an elongated bar-type pattern, it is a newer C N version.
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