Screw-thread and M-bayonetNumber of lenses /groups – 6 /4F stop range – f/3.5 – 4 – 5.6 – 8 – 11 – 16 – 22Closest focusing distance – 1 meterSmallest object field – 35 mmDiaphragm setting /type – 10-bladeAngle of view diagonal – 64 degreesFilter type – A36 and E39 /A42 versionsAccessories – Viewfinder: SBLOO 12010; Hood: IROOA 12571, FLQOO, FOOKH 12505; Lens with finder: SOONC-MW for M3; Lens with finder: SOONC-MT for M2; leather case ETILAMaterials – chrome platedDimensions (length x diameter) -Weight – 195 g /6.88 oz