Focal Distance 28mm Maximum caliber ratio 1 -vs 1.4 lens configuration 14 sheets (2 ED lenses, 3 aspherical lenses, with nanoclistal coat, fluorine coat) angle of view 75 ° (FX format digital SLR camera) 53 ° (DX format digital SLR camera) Focus RF (rear focus) method, autofocus with ultrasonic motor, manual focus shooting distance scale ∞ ~ 0.28m The shortest shooting distance 0.28m Maximum shooting magnification 0.17 times Number of squeezed feathers 9 pieces (circular aperture) Aperture method Automatic aperture by electromagnetic aperture Maximum aperture f/1.4 minimum aperture f/16 Metering method Open Metrophol Attachment size (filter size) 77mm (p = 0.75mm) Mount adapter FT1 suitable AF driven Dimensions 83.0mm (maximum diameter) x 100.5mm (from lens mount reference surface to lens tip) Mass about 645g Accessories ・ 77mm Spring type lens cap LC-77 ・ Back tattle LF-4 ・ Bayonet hood HB-83 ・ Lens case CL-1118 Specifications and appearance may be changed without notice for improvement.