SMC Pentax-M 135mm f/3.5 – MF Telephoto Prime – K Mount – Compact Vintage.

Description:
SMC Pentax-M 135mm f/3.5 manual-focus telephoto lens for Pentax K mount, in excellent vintage condition. Produced from 1977 to 1986, this compact prime is part of the celebrated M-series lineup, known for its sleek design and tactile precision. It features Pentax’s Super Multi-Coating (SMC) for enhanced contrast and flare resistance, and a long, smooth focus throw (~270°) for precise manual focusing.

Ideal for portraits, nature, and compressed-perspective scenes, this lens delivers excellent sharpness and color rendering—especially from f/5.6 to f/11. A built-in slide-out hood and all-metal construction round out its classic appeal.

Key Features:

• Focal Length: 135mm
• Maximum Aperture: f/3.5
• Mount: Pentax K (manual focus)
• Optical Design: 5 elements in 5 groups
• Minimum Focus Distance: 1.5m
• Maximum Magnification: 0.11×
• Filter Thread: 49mm
• Aperture Blades: 8 (automatic diaphragm)
• Hood: Built-in retractable
• Weight: ~270g
• Dimensions: 63 × 66mm
• Focus Throw: ~270° (long and precise)

Included:

• SMC Pentax-M 135mm f/3.5 lens
• Front and rear caps
  

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Pentax-M 135mm lens, manual focus telephoto prime, vintage Pentax K mount lens, SMC Pentax optics, compact 135mm lens, classic Pentax lens

Collector Notes:
Often overshadowed by faster 135mm lenses, the Pentax-M f/3.5 version shines with portability, build quality, and value. Its compact size makes it a perfect match for lightweight shooting kits, and its optical performance holds up impressively on modern digital bodies. The built-in hood adds practical flare control, and the silky focus ring remains a tactile pleasure decades later.