----------------------------------- Remus Boldis 08 Apr 2016 07:50 ----------------------------------- Specificatiile tehnice ale Helios 44 : Focal Distance: 58mm (may vary in real) Optical Formula: 6 elements in 4 groups. Aperture Range: f/2 - f/16. (f/22 later) Angle of View: 40°28 Geometric Vignetting: 58%