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Pentax 135mm F/3.5 SMC M K Mount Manual Focus Lens {49}

Pentax Cameras
KEH Model# 241972
Grade Notes Price Qty
With Caps


Pentax 135mm F/3.5 SMC M K Mount Manual Focus Lens {49} Description


A lens is considered telephoto if it magnifies the image by a factor of about 1.5x. This is based on 35mm full-frame or digital full-frame sensors. For example, a 100mm lens for full frame 35mm used on a digital camera with a sensor size such as APS-C format, will become a 150mm equivalent to 35mm full-frame. The smaller the sensor, the greater the ratio will be. If this is used with 35mm or full-frame digital, with a 100mm lens, you will double the magnification of a 50mm lens. This range and 80mm range are perfect for portraits, as they reproduce the human face without distortion. For example, using a 50mm or normal range will make the face slightly larger than normal and a 135mm lens would make the face more narrow than normal. The telephoto range of lenses can be 85mm, 135mm, 180mm and 200mm. 

KEH Specifications

  • Focal Length: 135mm
  • Aperture Maximum: f/3.5
  • Aperture Minimum: f/32
  • Camera Mount Type: Pentax K Bayonet
  • Format Compatibility: 35mm
  • Minimum Focus Distance: 5 feet
  • Elements/Groups: 5/5
  • Diaphragm Blades: 8
  • Tripod Collar: No
  • Filter Thread: 49mm
  • Length: 2.6 inches
  • Weight: 9.52 oz (270g)


General information

Brand Name Pentax
Product information
Lens Type Long / Telephoto

Technical Information

Fixed Focal Length 135 mm
Max Aperture f/3.5

Physical Characteristics

Lens Mount Pentax K (SMC, SMC-M)