lens:pen645smcls135mmf4
Table of Contents
Pentax 645 SMC 135mm f/4 Leaf Shutter
Summary
Manual focus moderate telephoto lens. This lens has a built-in leaf shutter which allows for high speed flash synchronization. The top speed with flash is 1/500s. The flash must be connected to the lens with an X-synch cord. The lens can also be used without the leaf shutter as an ordinary 645 lens. It has no A setting so Program and Tv exposure modes are not supported. Even though the lens was designed for the Pentax 645 film cameras it will also work on the 645D and 645Z.
Tech Specs
| Manufacturer | Pentax |
| Series | Pentax Leaf Shutter |
| Model | 645 SMC |
| Focal Length | 135mm |
| Max Aperture | f/4 |
| Min Aperture | f/32 |
| Format | 645 film |
| Image Circle | - |
| Minimum Focus | 125cm |
| Focus Rotation | ° |
| Iris Blades | 5 |
| Optical Design | 5/5 |
| Squeeze | none |
| Front Diameter | 76mm |
| Filter Thread | 58mm |
| Focus/Zoom Rod | none |
| Native Mount | Pentax 645 |
| Data Protocol | none |
| Length | 69mm |
| Weight | 470g |
| Body Telescope | - |
| Body Material | - |
| Focus Drive | - |
| Iris Drive | - |
| Zoom Drive | - |
History
Country of Origin:
Release Date:
Launch Price:
Design Revisions:
Service
Cine-Mod
Notes
Media
lens/pen645smcls135mmf4.txt · Last modified: 2026/07/02 06:19UTC by Justin Rhoads