Pentax SMC FA 645 33-55mm f4.5 AL

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.

Pentax SMC FA 645 33-55mm f4.5 AL

Pentax SMC FA 645 33-55mm f4.5 AL

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  • 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: 40 cm

  • Eight Blade Diaphragm

  • Front Filter Thread: 82mm


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 40 cm
  • 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
Brand
Pentax
Focal Length
33 - 55 mm
Aperture
Maximum: f/4.5
Camera Mount Type
Pentax 645
Angle of Coverage
80° - 53°
Minimum Focus Distance
40 cm
Diaphragm Blades
8
Elements/Groups
11/8
Magnification
0.21x
Distance scale
Yes
Autofocus
Yes
Tripod Collar
No
Filter Thread
Front: 82 mm
Weight
585
Dimensions
88 x 104 mm