Pentax smc FA 645 45-85mm f/4.5 Lens

product overview
product overview
  • Pentax 645 Mount

  • 35.5-67mm (35mm Equivalent)

  • Aperture Range: f/4.5-32

  • Construction: 11 Elements / 9 Groups

  • Minimum Focus Distance: 0.5m

  • Fast AF/MF Switching

  • Eight Blade Diaphragm

  • Front Filter Thread: 77mm

  • Petal-Shaped Lens Hood

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The Pentax smc FA 645 45-85mm f/4.5 Lens is a standard zoom lens capable of wide angle to short telephoto focal lengths equivalent to 35.5-67mm in 35mm format. The maximum f/4.5 aperture is constant throughout the zoom range, and it can stop down to a minimum of f/32. This is due in part to a lens construction of 11 elements in 9 groups.

During use, you can switch between auto and manual focus by simply sliding the focus ring forward or backward. It can even focus down to a minimum of 0.5 m away. Further benefiting image quality is an eight blade diaphragm that will ensure smooth out-of-focus areas. It also comes with a case and has a 77mm front filter thread.

  • 35mm focal length equivalent of 35.5-67mm
  • Aperture range of f/4.5 to f/32
  • Angle of view of 76° to 44.5° which equates to 61.5° to 36° on Pentax 645 digital cameras
  • Lens construction of 11 elements in 9 groups
  • Accepts 77mm threaded filters
  • Minimum focusing distance throughout the zoom range is 0.5m
  • Works with both film and digital formats
  • Aperture ring and focusing distance scale
  • Eight diaphragm blades for smooth out-of-focus areas


  • MPN - 26725
  • GTIN - 027075042551
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Focal Length45 - 85 mm
Focal Length45 - 85 mm
Aperture RangeMaximum: f/4.5
Minimum: f/32
ApertureMaximum: f/4.5
Minimum: f/32
Camera MountPentax 645
Camera Mount TypePentax 645
Angle of View76 - 44.5
Minimum Focus Distance0.5 m
Minimum Focusing Distance1.64’ (.5 m)
Diaphragm Blades8
Angle Of View76 to 44.5 @ Infinity
Distance scaleYes
Groups 9
Diaphragm Blades8
Tripod CollarNo
Filter SizeFront: 77 mm
Filter ThreadFront: 77 mm
Tripod CollarNo
Dimensions85 x 99.5 mm
Dimensions (DxL)Approx. 3.35 x 3.92“ (85 x 99.5 mm)
Optical Design11 Elements in 9 Groups
Distance ScaleYes
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What’s In The Box

Pentax smc FA 645 45-85mm f/4.5 Lens

  • Front Lens Cap

  • Rear Lens Cap

  • Case

  • Limited 1-Year Warranty

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