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The smc FA 645 200mm f/4 IF Lens from Pentax is a medium-format, manual and autofocusing telephoto lens with a 35mm-equivalent focal length of 157mm. It provides a soft out-of-focus (bokeh) effect. It features two extra-low dispersion (ED) glass elements to correct for chromatic aberration, and a ghostless coating to effectively eliminate reflections on the inner surface of the lens, in order to provide sharp images with high contrast. The inner focusing system improves focusing speed and minimizes lens extension, allowing for a closer minimum focus distance.
Focal Length | 200 mm |
Aperture | Maximum: f/4 Minimum: f/32 |
Camera Mount | Pentax 645 |
Angle of View @ Infinity | 15.5° |
Minimum Focus Distance | 4.92' (1.5 m) |
Diaphragm Blades | 8 |
Elements/Groups | 6 / 5 |
Magnification | 0.16x |
Maximum Reproduction Ratio | 1:6.25 |
Autofocus | Yes |
Filter Thread | 58 mm |
Dimensions | Approx. 2.93 x 4.69" (74.5 x 119 mm) |
Weight | 1.32 lb (.6 kg) |
Lens mount | Pentax 645 |
Lens mount | Pentax K |
Lens Format Coverage | Full Frame |
Lens Design | Prime Lenses |
Lens focus length, mm | 200 |
Focus Type | Autofocus |
Image Stabilization | No |
Lens type | medium-format |
Lens type | tele zoom |
Filter size | 58mm |
Maximum Aperture | f/4 |