5 Megapixel lens for 35 mm Full Frame sensors, focal length 28 mm, f/N 2.8 - 22, M42x1 FD 46.5 mount

Working distance: distance between the front end of the mechanics and the object. Percent deviation of the real image compared to an ideal, undistorted image. Measured from the front end of the mechanics to the camera flange at infinite focusing.

Main optical specifications
Focal length	(mm)	28
Image circle diameter	(mm)	43
Max sensor size		35 mm Full Frame

Angle of view
Full Frame	(deg)	73.6

Advanced optical specifications
Working distance range (1)	(m)	0.3 - inf
ƒ/N		2.8 - 22
Back focal length	(mm)	35.7
Distortion (2)	(%)	3

Mechanical specifications
Iris control		Manual
Focus control		Manual
Mount		M42x1 FD 46.5
Filter thread		M52 x 0.75
Outer diameter	(mm)	60.0
Length (3)	(mm)	34.2
Mass	(g)	170