The Pentax smc FA 645 55-110mm f/5.6 Lens is a standard zoom lens designed for Pentax 645 mount medium format cameras, both film and digital. It is designed for general shooting and has a standard to medium telephoto field of view with a 35mm equivalent focal length of 43.5-87mm. Also, it has a constant minimum aperture of f/5.6 and can stop down to f/45.
The lens design features 9 elements in 9 groups which feature a Super Multi Coating that prevents ghosting and flaring. For optimal image quality, the 55-110mm uses extra-low dispersion glass elements to prevent chromatic aberrations and maximize contrast and sharpness. Also, the lens will focus as close as 2.6'.
For smooth out-of-focus areas, the lens has an eight blade aperture diaphragm. There is also an 82mm front filter thread.
Focal Length | 55 to 110mm |
Maximum Aperture | f/5.6 |
Minimum Aperture | f/45 |
Lens Mount | Pentax 645 |
Angle of View | 28° to 53° |
Minimum Focus Distance | 2.62' / 0.8 m |
Maximum Magnification | 0.16x |
Optical Design | 9 Elements in 9 Groups |
Diaphragm Blades | 8 |
Focus Type | Autofocus |
Image Stabilization | No |
Filter Size | 82 mm (Front) |
Dimensions (ø x L) | 3.46 x 4.09" / 88 x 104 mm |
Weight | 1.1 lb / 500 g |
Package Weight | 1.86 lb |
Box Dimensions (LxWxH) | 8.4 x 7.95 x 5.35" |