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The 55 mm f/2.8�is the most popular wide angle focal length. In 645 format. It renders natural perspective with increased depth of field and angular coverage and provides the least amount of distortion of the wide angle range for subjects at the edges of the frame. Equivalent to 34mm in 35mm format. �

55mm f/2.8 Optical Construction 8 elements / 6 groups Angle of View 65 Degrees Minimum Aperture 22 Diaphragm Automatic Minimum Focusing Distance 1�5.7� /45cm Maximum Magnification Ratio 0.18x Area Covered 9.1 x 1� 0.3� / 231 x 312mm Equivalent 35mm Focal Length 34mm Filter Size 58mm Lens Hood Screw in Dimensions (L XW) 2.3 x 2.8� / 59.4 x 70mm Weight 11oz. / 305g J.P. Code 901040 Mamiya Code 302125