Paul Furman wrote:

Mr. Mark wrote:

Someone said in alt.photography that "film" lenses are designed to
focus the
different color wavelengths differently to make up for the layered
emulsion
in film. That sounds like non-sense to me.

Opinions?




I heard there is a coating on the rear element to prevent reflections
off the sensor for digital lenses though I've not seen any example of
these reflections so I assume it's quite a minor issue.

So minor that DSLR's cannot do OTF TTL metering. Any need for coatings
to help in this regard sounds like the cry of the marketeers.

Cheers,
Alan.


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