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

Model #26765

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Pentax 26765 1
Pentax 26765 1
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Specifications

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
Pentaxforums.34752456
9 August 2011
7.0/10

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

Pentaxforums.34752456
23 August 2017
7.0/10

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

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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