SMC Pentax-M 28mm F3.5 Wide Angle Lens – Manual Focus K Mount Japan

Description
The SMC Pentax-M 28mm F3.5 is a compact manual-focus wide-angle prime lens designed for Pentax K-mount 35mm film and full-frame digital SLRs. Manufactured between 1977 and 1985, it features a 6-element, 6-group optical design and Pentax’s renowned Super Multi-Coating (SMC) for improved contrast and flare resistance. With a 75° diagonal field of view and a minimum focus distance of 0.3m, it’s ideal for landscapes, architecture, and general-purpose shooting. This lens is engraved as “smc PENTAX-M 1:3.5 28mm” and is known for its excellent sharpness across the frame, even wide open.

Condition

• Dusty internally, possible fungus dots
• Aperture blades clean and snappy
• Focus ring smooth throughout range
• Barrel shows light cosmetic wear consistent with age
• Mount clean and free from damage
• Tested on digital body for functionality
• Overall condition: Excellent

Included

• SMC Pentax-M 28mm F3.5 lens
• Front and rear caps 
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Collectors Notes
This lens is the slower of the two M-series 28mm variants, prioritising sharpness and portability over speed. Often overlooked in favour of faster lenses, it’s a hidden gem for photographers who value precision and vintage character. Its compact size and low distortion make it a favourite among landscape and street photographers. Fully compatible with manual and aperture-priority modes on Pentax DSLRs, though it lacks an “A” setting on the aperture ring.

Key Features

• Focal length: 28mm
• Maximum aperture: F3.5
• Minimum aperture: F22
• Lens mount: Pentax K
• Focus type: Manual
• Optical design: 6 elements in 6 groups
• Diaphragm: 5 blades, automatic
• Minimum focus distance: 0.3m
• Filter thread: 49mm
• Dimensions: 63 × 31.5mm
• Weight: 180g
• Coating: Super Multi-Coating (SMC)

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