Pentax FA 645 35-55mm f/4.5 AL Lens

Pentax FA 645 35-55mm f/4.5 AL Lens

Code: 26775    Brand: Pentax   

This wide-angle zoom lens, with an aperture range of f/4.5 to f/32 and 35mm equivalent focal length of 26mm to 43.5mm, is built for use with medium-format PENTAX 645 mount cameras. 

APN: 0027075063228
Supplier Code: 26775

The Pentax smc FA 645 33-55mm f/4.5 AL Lens is a wide-angle zoom lens designed for use with medium format Pentax 645 mount cameras. It features an aperture range of f/4.5-32 and has a 35mm equivalent focal length of 26-43.5mm, providing a very useful range of wide-angle lengths. This lens in particular utilizes two aspherical elements that greatly reduce distortion, field curvature, and coma aberrations common with wide angle lenses.

The 33-55mm features a lens construction of 11 elements in 8 groups, including some high refraction low-dispersion glass. To maintain image quality, it uses a 3-group floating zoom to reduce field curvature throughout the range. Also, the 33-55mm has a minimum focus distance of 15.7".

  • For smooth out-of-focus areas, the lens has an eight blade aperture diaphragm. Additionally, it features an 82mm front filter thread.
  • 35mm focal length equivalent of 26-43.5mm
  • Aperture range of f/4.5 to f/32
  • Angle of view of 80° to 53° which equates to 65° to 43° on Pentax 645 digital cameras
  • Lens construction of 11 elements in 8 groups
  • Low-dispersion glass elements help to minimize chromatic aberrations and maximize sharpness
  • Accepts 82mm threaded filters
  • Minimum focusing distance throughout the zoom range is 15.7"
  • Super Multi Coating increases light transmission as well as helps to eliminate ghosting and flaring
  • Works with both film and digital formats
  • Aperture ring and focusing distance scale
  • Eight diaphragm blades for smooth out-of-focus areas

Lens Mount

PENTAX 645AF2 bayonet

Model No.


Focal Length

33-55mm (Equivalent to 26mm - 43.5mm in 35mm format)

Angle of View

80° - 53° - 645 Film 65° - 43° - 645Z, 645D

Lens Construction(group/elements)

11 elements in 8 groups

Min. Aperture (f)


Min. Focusing Distance


Max. Magnification


Filter Size


Diameter & Length (mm)

88mm x 104mm

Number of Diaphragm Blades






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