Pentax smc FA 645 33-55mm f/4.5 AL Lens


  • Pentax 645 Mount
  • 26-43.5mm (35mm Equivalent)
  • Aperture Range: f/4.5-32
  • Two Aspherical Elements
  • Low-Dispersion Glass Elements
  • Construction: 11 Elements / 8 Groups
  • Minimum Focus Distance: 15.7″
  • Eight Blade Diaphragm
  • Front Filter Thread: 82mm

Special Order - Available in 2 to 4 weeks - Depending on availability from manufacturer

SKU: 11238 Categories: , , , , Tags: , ,

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
Package Weight 2.05 lbs
Package Dimensions 6.378 x 5.433 x 5.118 in

1.29 lb (585 g)

Box Dimensions (LxWxH)

6.378 x 5.433 x 5.118″



Distance Scale


Tripod Collar


Angle of View @ Infinity

80° – 53°



Package Weight

2.05 lb


Approx. 3.46 x 4.09″ (88 x 104 mm)


Maximum: f/4.5 Minimum: f/32

Filter Thread

Front: 82 mm

Focal Length

33 – 55 mm

Minimum Focus Distance

15.75″ (40 cm)

Diaphragm Blades


Camera Mount

Pentax 645



Lens Type



There are no reviews yet.

Be the first to review “Pentax smc FA 645 33-55mm f/4.5 AL Lens”