Pentax smc FA 645 55-110mm f/5.6 Lens

product overview
product overview
  • Pentax 645 Mount

  • 43.5-87mm (35mm Equivalent)

  • Aperture Range: f/5.6-45

  • Extra-Low Dispersion Glass Elements

  • Super Multi Coating

  • Construction: 9 Elements / 9 Groups

  • Minimum Focus Distance: .8 m

  • Eight Blade Diaphragm

  • Front Filter Thread: 82mm

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The Pentax smc FA 645 55-110mm f/5.6 Lens is a standard zoom lens designed for Pentax 645 mount medium format cameras, both film and digital. It is designed for general shooting and has a standard to medium telephoto field of view with a 35mm equivalent focal length of 43.5-87mm. Also, it has a constant minimum aperture of f/5.6 and can stop down to f/45.

The lens design features 9 elements in 9 groups which feature a Super Multi Coating that prevents ghosting and flaring. For optimal image quality, the 55-110mm uses extra-low dispersion glass elements to prevent chromatic aberrations and maximize contrast and sharpness. Also, the lens will focus as close as 2.6'.

For smooth out-of-focus areas, the lens has an eight blade aperture diaphragm. There is also an 82mm front filter thread.

  • 35mm focal length equivalent of 43.5-87mm
  • Aperture range of f/5.6 to f/45
  • Angle of view of 53° to 28° which equates to 43° to 22.5° on Pentax 645 digital cameras
  • Lens construction of 9 elements in 9 groups
  • Super Multi Coating increases light transmission as well as helps to eliminate ghosting and flaring
  • Extra low-dispersion glass elements help to minimize chromatic aberrations and maximize sharpness
  • Minimum focusing distance is .8 m
  • Accepts 82mm threaded filters
  • Works with both film and digital formats
  • Aperture ring and focusing distance scale
  • Eight diaphragm blades for smooth out-of-focus areas


  • MPN - 26765
  • GTIN - 027075054554
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Focal Length55 - 110 mm
Focal Length55 - 110 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 View53 - 28 (Infinity)
Minimum Focus Distance.8 m
Minimum Focusing Distance2.62’ (.8 m)
Diaphragm Blades8
Angle Of View53 - 28 @ Infinity
Distance scaleYes
Groups 9
Diaphragm Blades8
Tripod CollarNo
Filter SizeFront: 82 mm
Filter ThreadFront: 82 mm
Tripod CollarNo
DimensionsApprox. 88 x 104 mm
Dimensions (DxL)Approx. 3.46 x 4.09“ (88 x 104 mm)
Optical Design9 Elements in 9 Groups
Distance ScaleYes
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What’s In The Box

Pentax smc FA 645 55-110mm f/5.6 Lens

  • Front Lens Cap

  • Rear Lens Cap

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