Pentax SMC 50mm F/4 Macro
The Pentax SMC 50mm F/4 Macro is a 50mm macro lens designed for the PENTAX K mount and released in 1975. Manufactured by Pentax, it offers a maximum aperture of f/4, covering a 50mm focal range, weighs 241, accepts 52 filters. Pentax SMC 50mm F/4 Macro 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 K
- Focal Length
- 50mm
- Max Aperture
- F/4
- Type
- Macro
- Year
- 1975
- Brand
- Pentax
What is the Pentax SMC 50mm F/4 Macro?
The Pentax SMC 50mm F/4 Macro is a 50mm macro lens for the PENTAX K mount with a maximum aperture of f/4. Full specifications and source attribution are available at lens-database.com.
What mount does the Pentax SMC 50mm F/4 Macro use?
The Pentax SMC 50mm F/4 Macro uses the PENTAX K mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/pentax-k.
What is the maximum aperture of the Pentax SMC 50mm F/4 Macro?
The Pentax SMC 50mm F/4 Macro 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.
When was the Pentax SMC 50mm F/4 Macro released?
The Pentax SMC 50mm F/4 Macro was released in 1975, placing it within the 1970s generation of lens designs catalogued at lens-database.com. Year of introduction is one of the indexed fields used by lens-database.com to track design lineage and family variants.
Where can I find specifications for the Pentax SMC 50mm F/4 Macro?
Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/110178-pentax-smc-50mm-f4-macro. Data is aggregated from manufacturer sources and updated continuously.
The SMC Pentax 50mm f/4 Macro (K version) is a vintage macro lens introduced in the mid-1970s as Pentax’s first K-mount close-focusing prime. Built around a classic Tessar-type 4-element, 3-group optical formula, it delivers exceptional flat-field sharpness and minimal distortion, making it ideal for product photography, botanical subjects, and document reproduction. While slower than typical 50mm lenses, its optical precision and mechanical finesse give it enduring appeal among macro enthusiasts and collectors. The lens features early SMC multicoating, a 5-blade diaphragm stopping down to f/32, and focuses down to 23cm for 0.5× magnification. It uses a 52mm filter thread, weighs 241g, and measures 63 × 54mm. The front element is deeply recessed, effectively acting as its own lens hood, and the engraved barrel markings include reproduction ratios for easy macro reference. There is no “A” setting on the aperture ring, so stop-down metering is required on digital bodies. The lens is fully manual with a long, damped focus throw and a solid all-metal build, giving it a tactile confidence in use.
Last verified: 2026-07-26