See http://www.zeissikon.com/lens.25.htm

Focal length: Aperture range: No. of lenses/groups: Focusing range: Magnification at close range: Coverage at close range: Angle of view diag/horiz/vert: Filter: Weight: Ordering number silver finish: Ordering number black finish:

25 mm 2.8-22 9/7 0.5 m (1’7.7”) – infinity 1:18 43 x 65 cm (1'4 15/16" x 2'1 9/16") 82/72/52 degrees M46x0.75 260 g (9.2 oz.) 30 82025 30 82026