Xenar 2.8/50mm

 

OPTO-MECHANICAL DATA

(with lens focused at infinity)

Lens Elements, Groups

4, 3

Filter Mounting Thread

M 49 X 0.75 or *M 29.5 X 0.4

Max. f/#

22

Push-On Filter Size

51mm or *46mm

Max. Outer Diameter

60mm or *50.5mm

Weight

220g or *105g

Overall Length

49mm or *30mm

 

IMAGE DATA

(with lens focused at infinity)

Recommended Format (negative) Size

24 X 36 mm

 

OPTICAL DATA

(with lens focused at infinity)

Effective Focal Length (F')

49.3mm

Back Focal Length (S'F')

39mm

Principal Point Separation (HH')

0.4mm

Shortest Image Distance (S'O')

0.5m or *0.6m