This telephoto lens, with a f/5.6 to f/45 aperture and a 35mm equivalent focal length of 118.5mm to 237mm, fits medium-format PENTAX 645 mount cameras. As the photographer can choose from a wide, versatile range of telephoto focal lengths, extra-low dispersion glass elements add high contrast to images and lessen chromatic aberrations. While the lens internally focuses, a slide ring moving back and forth lets you adjust from auto to manual focus. Each allows for a minimum focus distance of 6.6 feet and a filter thread size of 67mm. Super Protect coating reduces scratches and makes the system easier to clean.

Key Features

• 35mm focal length equivalent of 118.5–237mm.
• Aperture range of f/5.6 to f/45.
• Angle of view of 21° to 10.5°, which equates to 17° to 8.5° on Pentax 645 digital cameras.
• Lens construction of 15 elements in 13 groups.
• Two extra-low dispersion glass elements help to minimize chromatic aberrations and maximize sharpness.
• Accepts 67mm threaded filters.
• Minimum focusing distance throughout the zoom range is 6.6'.
• Super Protect coating on the front element helps keeps your lens scratch free and easy to clean.
• Internal focusing keeps the lens as compact as possible during use.
• Works with both film and digital formats.
• Aperture ring and focusing distance scale.
• Eight diaphragm blades for smooth out-of-focus areas.