Pentax smc FA 645 150-300mm f/5.6 ED [IF] Lens

product overview
product overview
  • Pentax 645 Mount

  • 118.5-237mm (35mm Equivalent)

  • Aperture Range: f/5.6-45

  • Extra-Low Dispersion Glass Elements

  • Super Protect (SP) Coating

  • Construction: 15 Elements / 13 Groups

  • Internal Focusing

  • Fast AF/MF Switch

  • Minimum Focus Distance: 2 m

  • Filter Thread Size: 67mm

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The Pentax smc FA 645 150-300mm f/5.6 ED [IF] Lens is a telephoto zoom lens designed for medium-format Pentax 645 mount cameras. It has an aperture range of f/5.6-45, and when used on 645 cameras, the lens has a 35mm equivalent focal length of 118.5-237mm. This gives you a wide, versatile range of telephoto focal lengths to choose from during shooting.

This lens has a construction of 15 elements in 13 groups that is designed for high quality images. It even has extra-low dispersion glass elements that minimize the effects of chromatic aberrations and provide high contrast images for maximum resolution. This is all protected by a Super Protect (SP) coating on the front element that lessens the possibility of scratches and makes it easier to clean.

During operation, the lens internally focuses, keeping the large lens as compact as possible, and it switches from auto to manual focus by sliding the focus ring forward or backward. The lens also has a minimum focus distance of 6.6' and a filter thread size of 67mm.

  • 35mm focal length equivalent of 118.5-237mm
  • Aperture range of f/5.6 to f/45
  • Angle of view of 21° to 10.5° which equates to 17° to 8.5° on Pentax 645 digital cameras
  • Lens construction of 15 elements in 13 groups
  • Two extra-low dispersion glass elements help to minimize chromatic aberrations and maximize sharpness
  • Accepts 67mm threaded filters
  • Minimum focusing distance throughout the zoom range is 2m
  • Super Protect coating on the front element helps keeps your lens scratch free and easy to clean
  • Internal focusing keeps the lens as compact as possible during use
  • Works with both film and digital formats
  • Aperture ring and focusing distance scale
  • Eight diaphragm blades for smooth out-of-focus areas


  • MPN - 26785
  • GTIN - 027075074095
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Focal Length150 - 300 mm
Focal Length150 - 300 mm
Aperture RangeMaximum: f/5.6
Minimum: f/45
ApertureMaximum: f/5.6
Minimum: f/45
Camera MountPentax 645
Camera Mount TypePentax 645
Angle of View21 - 10.5 (Infinity)
Minimum Focus Distance2 m
Minimum Focusing Distance6.56’ (2 m)
Diaphragm Blades8
Angle Of View21 - 10.5 @ Infinity
Distance scaleYes
Diaphragm Blades8
Filter SizeFront: 67 mm
Filter ThreadFront: 67 mm
DimensionsApprox. 80 x 201 mm
Dimensions (DxL)Approx. 3.15 x 7.91“ (80 x 201 mm)
Optical Design15 Elements in 13 Groups
Distance ScaleYes
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What’s In The Box

Pentax smc FA 645 150-300mm f/5.6 ED [IF] Lens

  • Front Lens Cap

  • Rear Lens Cap

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