Olympus G.Zuiko Auto-S 55mm F1.2 . Prime lens ( Ultra-Fast )

It is a standard focal-length lens with the fastest maximum aperture of F 1.2 currently available. Despite the fast lens speed , high resolving power shows no edge fall-off in the picture. It produces extremely pleasing out-of-focus effects at full aperture. It permits close-up up to 45cm subject distance . Very useful on night photography taking advance of the F1.2 maximum aperture.

Notes : Accurate focusing is required at full lens opening since the depth-of-field is extremely shallow.

Focusing screens : 1-1 , 1-2 , 1-3, 1-4, 1-6 , 1-10 , 1-13 and 1-14.

Angle of view : 43 º

Optical construction : 7 elements in 6 groups.

Diaphragm operation : Automatic.

F–stop range : 1.2 ~16.

Minimum focus : 0,45m  (1.5)

Minimum field size : 15 x 23cm  ( 5.9 x 9 .1 )

Focusing : Straight helicoids.

Weight : 310 grams  ( 10.9)

Length : 47mm  (1.9 )

Maximum diameter : 65mm ( 2.6 )

Filter size :  55mm.Ø

Hood : 57mm slide-on.