This is the standard manual-focus lens offered with the Pentax 645, 645N and 645N II medium format cameras. You'll usually get one of these when you get a Pentax 645 outfit.
It works in all the automatic and manual exposure modes of the Pentax 645, 645N and 645NII.
Comes with a genuine Australian Manufacturer's warranty
Optics6 elements in 5 groups.Multicoated (Pentax Super Multi Coated: SMC).
Focal Length75mm.
Diaphragm8 blades stopping down to f/22. Arbitrary half and full-stop clicks.
Close Focus2 feet (0.6m).
Filter Thread58mm, metal.Does not rotate with focus.
Size2.91" diameter x 1.48" long (74 x 37.5mm).
Weight8.505 oz. (241.15g) measured. 8.5 oz. (240g) specified.
Mechanics and ConstructionThe Pentax 645 75mm is made as it should be.Barrel: Enameled, anodized aluminum.Focus Ring: Metal, rubber covered.Aperture Ring: Metal.Depth-of-Field Scale: Yes.Infra-Red Focus Index: Yes.Finish: Black enamel over black anodize.Mount: Metal.Internals: Metal, with some plastic nubbins.Markings: Engraved and filled with paint.