Radionar 2.8/40mm

 

OPTO-MECHANICAL DATA

(with lens focused at infinity)

Lens Elements, Groups

3, 3

Filter Mounting Thread

M 46 X 0.75

Max. f/#

22

Push-On Filter Size

_

Max. Outer Diameter

_

Weight

_

Overall Length

_

 

IMAGE DATA

(with lens focused at infinity)

Recommended Format (negative) Size

28.1 X 28.6 mm

 

OPTICAL DATA

(with lens focused at infinity)

Effective Focal Length (F')

41mm

Back Focal Length (S'F')

34mm

Principal Point Separation (HH')

-0.8mm

Shortest Image Distance (S'O')

1m