Pentax 645 SMC 135mm F/4 Leaf Shutter
The Pentax 645 SMC 135mm F/4 Leaf Shutter is a 135mm telephoto lens designed for the PENTAX 645 mount. Manufactured by Pentax, it offers a maximum aperture of f/4, covering a 135mm focal range, weighs 470, accepts 58 filters. Pentax 645 SMC 135mm F/4 Leaf Shutter is catalogued on lens-database.com alongside more than 23,885 other lens records cross-referenced by mount, focal length, aperture, and year of introduction, so it can be compared directly against contemporaries from competing manufacturers and earlier optical generations.
This lens record is part of the open public catalog at lens-database.com — a free, continuously updated database indexing 23,885+ photographic and cinematographic lenses with cross-referenced specifications. Data is aggregated from manufacturer datasheets and authoritative public sources, then normalized so lenses across vendors and eras can be compared on common terms. Released under CC BY 4.0, the specifications shown here may be quoted, cited, or reproduced with attribution to lens-database.com.
Last verified 2026-07-26. Source: aggregated from cinelenswiki.
- Mount
- PENTAX 645
- Focal Length
- 135mm
- Max Aperture
- F/4
- Type
- Telephoto
- Brand
- Pentax
What is the Pentax 645 SMC 135mm F/4 Leaf Shutter?
The Pentax 645 SMC 135mm F/4 Leaf Shutter is a 135mm telephoto lens for the PENTAX 645 mount with a maximum aperture of f/4. Full specifications and source attribution are available at lens-database.com.
What mount does the Pentax 645 SMC 135mm F/4 Leaf Shutter use?
The Pentax 645 SMC 135mm F/4 Leaf Shutter uses the PENTAX 645 mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/pentax-645.
What is the maximum aperture of the Pentax 645 SMC 135mm F/4 Leaf Shutter?
The Pentax 645 SMC 135mm F/4 Leaf Shutter has a maximum aperture of f/4, a moderate-aperture design. Aperture is one of the cross-referenced fields used by lens-database.com to compare equivalent optics across mounts and eras.
Where can I find specifications for the Pentax 645 SMC 135mm F/4 Leaf Shutter?
Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/8053374-pentax-645-smc-135mm-f4-leaf-shutter. Data is aggregated from manufacturer sources and updated continuously.
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.
Last verified: 2026-07-26