PENTAX's medium-format, manual and autofocusing short telephoto and portrait prime lens gives a 35mm equivalent focal length of 94.5mm when used with the PENTAX 645Z oe 645D or 77mm with the 645 film camera. It features floating and independently-moving aperture mechanisms and was developed with computer-assisted design technology for precision.
The smc FA 645 120mm f/4 Macro Lens from Pentax is a medium format, manual and 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. The super multi coating (SMC) significantly increases the amount of light transmission. The lens offers a 1:1 magnification ratio and focuses as close as 15.4". The focus limiter can be used to set the focusing distance range for increasing the speed of the autofocus. The maximum aperture of f/4 can be stopped down as far as f/32. The lens was developed using computer-assisted optical design technology for a high degree of precision. It uses a floating mechanism and an independently-moving aperture mechanism. It also 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.
This is a macro lens that enables 1:1 shooting at a minimum shooting distance of 39.5cm. This lens uses a floating mechanism, independently-moving aperture mechanism, extraordinary-low dispersion glass, and other features. This enables effectively correcting of various types of aberration for obtaining sharp digital images with high contrast from the infinity end to the minimum shooting distance. This is a medium telephoto macro lens with a wide working distance for capturing the intensity of closeups of flowers or insects in outdoor settings. The focus limiter can be used to set the focusing distance range for increasing the speed of the autofocus.
PENTAX 645AF2 bayonet
120mm (Equivalent to 94.5mm in 35mm format)
Angle of View
32.5° - 645 Film 26° - 645Z, 645D
9 elements in 7 groups
Min. Aperture (f)
Min. Focusing Distance
Diameter & Length (mm)
82.5mm x 110mm
Number of Diaphragm Blades
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