Pentax smc FA 645 120mm f/4.0 Macro Lens

The Pentax smc FA 645 120mm f/4.0 Macro Lens is a medium-format, manual and autofocusing short telephoto and portrait prime lens, give a 35mm equivalent focal length of 96mm when used with the PENTAX 645D or 77mm with the 645 film camera. Lens features floating and independently-moving aperture mechanisms and was developed with computer-assisted design technology for precision.Super Multi Coating improves light transmission, while Extra-low Dispersion (ED) corrects chromatic aberration to create sharp, high-contrast images across the focusing range. It features a 1:1 magnification ratio, has a f/4 maximum aperture that stops as far as f/32, and focuses as close as 15.4". Use the focus limiter to set a distance range for increasing the autofocus speed.Features: Medium format, autofocusing, short telephoto/portrait prime lens that provides a 35mm equivalent focal length of 96mm when used on a Pentax 645D or 77mm on a film 645 camera.Treated with super multi coating (SMC) to significantly increase the amount of light transmission.Magnification ratio of 1:1 (1x magnification).Minimum focus distance of 15.4". The focus limiter can be used to set the focusing distance range for increasing the speed of the autofocus.Maximum aperture of f/4 can be stopped down as far as f/32.Uses a floating mechanism and an independently-moving aperture mechanism.Features extra-low dispersion (ED) glass to correct for chromatic aberrations, helping to deliver sharp imagery with high contrast and clarity throughout the focusing range.Developed using computer-assisted optical design technology for a high degree of precision.