- Pentax 645 Mount
- 26-43.5mm (35mm Equivalent)
- Aperture Range: f/4.5-32
- Two Aspherical Elements
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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 |
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Wide angle autofocus zoom. When used on the film 645D the angle of view corresponds to a 26-44mm lens in the 24x36 format. It is a good lens for sweeping landscape photos. It features SMC (super multi coating) to increase the amount of light transmitted by the lens, ghost-less coatings and it contains 2 aspherical lenses for sharp pictures across the scene. 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 |
| Focal Length | 33 - 55 mm |
| Aperture | Maximum: f/4.5 Minimum: f/32 |
| Camera Mount | Pentax 645 |
| Angle of View @ Infinity | 80° - 53° |
| Minimum Focus Distance | 15.75" (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 | 1.29 lb (585 g) |
| Dimensions | Approx. 3.46 x 4.09" (88 x 104 mm) |
Whats in the box? |
Pentax smc FA 645 33-55mm f/4.5 AL Lens Front Lens Cap Lens Hood |
