fralexis
16-Nov-2016, 14:26
I just bought a beautiful convertible lens from Central Camera in Chicago. It is an Ilex-Calumet Series 8 Caltar. On the aperture ring it has the settings for 4.8 through 45 and a scale marking 8 1/2". Just above this ring is another scale going from 10 to 45. That scale says 14". So I assume the 14" scale is for the lens when used as a 14" lens and the other when used as a 8 1/2" lens.
Do I simply convert inches to millimeters? So the 14" lens would be 355.6 mm? And the 8 1/2" would be a 215.9 mm lens?
According to the scale, the 14" scale shows a maximum aperture of 4.8 and the 8 1/2" lens has a maximum aperture of 10. Does this sound like I am understanding this?
Thanks!
Alexis
Do I simply convert inches to millimeters? So the 14" lens would be 355.6 mm? And the 8 1/2" would be a 215.9 mm lens?
According to the scale, the 14" scale shows a maximum aperture of 4.8 and the 8 1/2" lens has a maximum aperture of 10. Does this sound like I am understanding this?
Thanks!
Alexis