Xenar 2.8/38mm

 

OPTO-MECHANICAL DATA

(with lens focused at infinity)

Lens Elements, Groups

4, 3

Filter Mounting Thread

M 38 X 0.75

Max. f/#

16

Push-On Filter Size

43mm

Max. Outer Diameter

47mm or 54mm

Weight

150g or *215g

Overall Length

25mm or *33mm

 

IMAGE DATA

(with lens focused at infinity)

Recommended Format (negative) Size

22.8 X 23.5 or *23.5 X 23.5mm

 

OPTICAL DATA

(with lens focused at infinity)

Effective Focal Length (F')

37.8mm

Back Focal Length (S'F')

29.9mm

Principal Point Separation (HH')

1.0mm

Shortest Image Distance (S'O')

0.5m or *0.75