01-13-2014, 04:29 AM
I'm not sure about the need for stupid xx.5mm increment marketing focal lengths. Couldn't they just call it a 43mm lens (both Voigtlander and Leica)?
This marketing number is surely more precise than the nominal (as-designed or as-computed) and actual (as-manufactured) focal lengths.
It could be acceptable on small-format wide-angle lenses where each 1mm translates to a more significant difference of field-of-view, but on a 43mm lens, it's only a 1% difference!
This marketing number is surely more precise than the nominal (as-designed or as-computed) and actual (as-manufactured) focal lengths.
It could be acceptable on small-format wide-angle lenses where each 1mm translates to a more significant difference of field-of-view, but on a 43mm lens, it's only a 1% difference!