01-19-2011, 02:41 PM
[quote name='genotypewriter' timestamp='1295444487' post='5643']
Slower and/or longer lenses are much easier to correct for CA. Honestly, I haven't seen anything faster than f/2 without LoCA.
[/quote]
... and my question is, why is that so? How does being a slower lens helps correcting spherical aberrations? Is that because of the coating (which allows less but collimated light) or polishment applied to the glass etc...
Serkan
Slower and/or longer lenses are much easier to correct for CA. Honestly, I haven't seen anything faster than f/2 without LoCA.
[/quote]
... and my question is, why is that so? How does being a slower lens helps correcting spherical aberrations? Is that because of the coating (which allows less but collimated light) or polishment applied to the glass etc...
Serkan