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General| Focal Length | 75mm |
|---|---|
| Maximum Aperture | f/2.8 |
| Minimum Aperture | f/22 |
| Lens Mount | Pentax 645 |
| Lens Type | Standard |
| Focus Type | Manual Focus |
| Format Compatibility | Medium Format |
| Minimum Focus Distance | 0.7 m (2.3 ft) |
| Elements/Groups | 7/6 |
| Diaphragm Blades | 9 |
| Filter Size | 67 mm |
| Autofocus | No |
| Image Stabilization | No |
Identifies key components of the Pentax 645 lenses, including rings, sockets, and scales.
Explains how to convert lens focal lengths to 35mm format by multiplying by 0.6.
Details the specific lens hoods and cases for the 75mm f/2.8 and 135mm f/4 lenses.
Describes the two ways to operate the lenses, utilizing either the camera's or the lens's leaf shutter.
Guides users on mounting and removing lenses, including notes on lens contact care.
Explains how to use the lens with the camera's focal plane shutter, including cocking the lens shutter and selecting modes.
Details the procedure for using the lens's built-in leaf shutter, including setting speeds and cocking the shutter.
Lists important warnings and limitations when operating the lens in leaf shutter mode, including flash and exposure.
Explains flash synchronization speeds and precautions for using electronic flashes with the lens shutter.
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