This medium telephoto zoom lens transitions from 63mm to 126.55mm, with a 35mm equivalent focal length, offers a f/4.5 maximum aperture, and features autofocus extending down to f/32. It uses extra-low dispersion (ED) glass and extraordinary-low dispersion glass in the optical system to effectively correct the various types of aberrations, and a ghost-less coating is used for effectively preventing reflections on the lens inner surface.
The Pentax smc FA 645 80-160mm f/4.5 Lens is a medium telephoto zoom lens with a 35mm equivalent focal length of 63-126.5mm and a maximum aperture of f/4.5. The autofocus lens can stop down to f/32 and features multiple types of low dispersion glass elements throughout its 11 element and 10 group construction. This is benefited by the use of a Super Multi Coating that helps eliminate flare and ghosting.
The lens can focus as close as 3.3' during use and has an eight blade diaphragm to help create smooth out-of-focus areas. Also, it can accept 77mm filters via a front thread and includes a lens hood. The 80-160mm also features the ability to turn the front of the lens while the hood is attached for easily adjusting your filters.
This is a medium telephoto 2X zoom that enables you to frame any landscape just as you like. This lens uses extra-low dispersion (ED) glass and extraordinary-low dispersion glass in the optical system to effectively correct the various types of aberrations, and a ghostless coating is used for effectively preventing reflections on the lens inner surface. This enables a sharp image with high contrast. A flower-shaped hood for cutting incident outside light is also included. The lens tip can be rotated from the outer side with the hood still attached, and a filter rotating operation part is provided for enabling easy usage of circular polarizing filters and other accessories.
PENTAX 645AF2 bayonet
80-160mm (Equivalent to 63mm - 126mm in 35mm format)
Angle of View
47° - 21.5° - 645 Film 38° - 17.5° - 645Z, 645D
11 elements in 10 groups
Min. Aperture (f)
Min. Focusing Distance
Diameter & Length (mm)
85mm x 130.5mm
Number of Diaphragm Blades
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