It incorporates an adjustable floating element system for correction of edge sharpness and distortion, especially at wide open apertures and close distances.
Applications include group portraits, wedding photography, and general purpose wide angle photography. Equivalent to 32mm in 35mm format.
Minimum Aperture 32
Shutter Seiko #1 mechanical lens shutter, 1~1/400 sec., T (time), X contact (flash sync at all speeds)
Minimum Focusing Distance 1' 1.7" / 348mm
Filter Size 77mm