This zoom lens offers a wide coverage of the telephoto range with a f/5.6 to f/45 aperture and a 35mm equivalent focal length of 118.5mm to 236mm. Its compact design allows for easy portability when travelling. Extra-low dispersion glass elements add high contrast to images and lessen chromatic aberrations.
The Pentax smc FA 645 150-300mm f/5.6 ED [IF] Lens is a telephoto zoom lens designed for medium-format Pentax 645 mount cameras. It has an aperture range of f/5.6-45, and when used on 645 cameras, the lens has a 35mm equivalent focal length of 118.5-237mm. This gives you a wide, versatile range of telephoto focal lengths to choose from during shooting.
This lens has a construction of 15 elements in 13 groups that is designed for high quality images. It even has extra-low dispersion glass elements that minimize the effects of chromatic aberrations and provide high contrast images for maximum resolution. This is all protected by a Super Protect (SP) coating on the front element that lessens the possibility of scratches and makes it easier to clean.
During operation, the lens internally focuses, keeping the large lens as compact as possible, and it switches from auto to manual focus by sliding the focus ring forward or backward. The lens also has a minimum focus distance of 6.6 and a filter thread size of 67mm.
This is a 2X zoom lens with wide coverage of the telephoto range. It has a compact design for easy portability when on mountains or outdoors, and it enables capturing of the best angle of the subject without approaching it. The second and fourth lenses use extra-low dispersion (ED) glass for minimizing chromatic aberration and providing sharp imaging performance with high contrast and high resolution. The minimum shooting distance is 2m over the entire zoom range, and the maximum shooting magnification is 0.18X (at 300mm), which is performance rivaling single focal point lenses. An inner focus and inner zoom are used for minimizing changes in the total length or weight balance when focusing and zooming for providing superior ease of operation. AF/MF switching is performed quickly by simply sliding the entire focus ring forward or backward.
PENTAX 645AF2 bayonet
150mm - 300mm (Equivalent to 118mm - 236mm in 35mm format)
Angle of View
21° - 10.5° - 645 Film 17° - 8.5° - 645Z, 645D
15 elements in 13 groups
Min. Aperture (f)
Min. Focusing Distance
Number of Diaphragm Blades
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