Actually, there is a 'unclean' uncoated lens that is okay - and that is
when an uncoated lens acquires some tarnishing. H.D.Taylor, the
inventor of the Cooke Triplet, noticed that old tarnished lenses had
higher light transmission than newly pollished ones.
todd
On 10-Nov-05, at 3:56 PM, Marc James Small wrote:
Second, there is nothing at all improper in the using of an uncoated lens,
provided that it is clean -- a dirty uncoated lens and a dirty coated lens
will both perform poorly in terms of light scatter and the like.
Marc
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