Pentax 50mm f1.7 SMC Pentax-M Lens (AS-IS)

NOTE: This item is being sold AS-IS and may not be returned or exchanged. Some artifacts in between lens elements that will likely show in image.

The Pentax 50mm f/1.7 SMC Pentax-M is a compact manual focus standard prime lens built for Pentax K-mount 35mm SLR cameras, offering the classic 50mm field of view paired with a fast f/1.7 maximum aperture in the notably small, lightweight body that defined Pentax’s M-series lens lineup. Designed to complement Pentax’s compact M-series camera bodies, this lens paired genuine speed with impressive portability.

The 50mm focal length delivers a natural, true-to-life field of view well suited to everyday photography, portraits, and general shooting where a more immersive perspective is desired. The f/1.7 maximum aperture provides strong low-light capability and the ability to achieve pleasing background separation, making it a versatile choice for available-light photography and portrait work, while remaining more compact and affordable than Pentax’s faster f/1.4 standard lens offerings.

Optically, the lens benefits from Pentax’s SMC (Super Multi Coating) technology, applied across the lens elements to reduce internal reflections, flare, and ghosting while improving contrast and color rendition compared to lenses using older, single-layer coatings. This coating technology contributed to the sharp, contrasty, and color-accurate images that vintage Pentax glass remains known for among film photographers and collectors today.

Built with the all-metal construction typical of Pentax’s manual focus era, the lens features a smoothly damped focus ring and a manual aperture ring with click-stops for precise, tactile control over exposure. Its Pentax K mount allows it to attach directly to Pentax’s manual focus and many autofocus K-mount SLR bodies, and with the appropriate adapter, it can also be mounted on numerous modern mirrorless camera systems, giving it continued appeal for photographers who enjoy shooting with manual vintage optics or adapting classic SMC Pentax glass to contemporary digital bodies.

Specs:
– Focal length: 50mm
– Maximum aperture: f/1.7
– Lens mount: Pentax K mount
– Coating: SMC (Super Multi Coating)
– Focus type: Manual focus
– Aperture control: Manual aperture ring with click-stops
– Construction: All-metal barrel and mount