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

Model #26765

USA Version
Pentax 26765 1
Pentax 26765 1
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General Information

Focal Length 55 - 110 mm
Aperture Maximum: f/5.6
Minimum: f/45
Camera Mount Pentax 645
Angle of View @ Infinity 53° - 28°
Minimum Focus Distance 2.62' (.8 m)
Diaphragm Blades 8
Elements/Groups 9/9
Magnification 0.16x
Distance Scale Yes
Autofocus Yes
Tripod Collar No
Filter Thread Front: 82 mm
Weight 1.10 lb (500 g)
Dimensions Approx. 3.46 x 4.09" (88 x 104 mm)
User Reviews
23 August 2017

This is based on one sample on one 645z body. Comments refer to the central area of the lens only, as for my images I don't much care if the corners go soft. I also don't concern myself much with distortion, as it's so easy to correct. Most all of my images are in good light at base ISO.

  • +

    Relatively light and compact

  • -

    Feels cheap it's so light, 82 mm filters are expensive

9 August 2011

I'd hoped this lens, which seems to have a similar optical layout to the greatly respected P67 55-100 lens, would be as sharp. Wide open, the lens is very soft in the outer 1/3 of the frame. Not until stopped down to f8 is most of the frame sharp and contrasty. By f11, the whole frame is sharp.

  • +

    small and convenient

  • -

    not sharp until f8-f11; req large 82mm filters

Product Highlights
  • 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: 2.6'
  • Eight Blade Diaphragm
  • Front Filter Thread: 82mm
In The Box
  • Pentax smc FA 645 55-110mm f/5.6 Lens
  • Front Lens Cap
  • Rear Lens Cap
  • Limited 1-Year Warranty
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