At 12:56 AM 7/25/98 -0500, Joel Wilcox wrote:
>
>Oly Shooters:
>
>A while ago I asked whether MC filters might not be a solution to flare in
>SC lenses.
[BIG snip]
Joel:
The issue is not whether an MC filter will reduce flare for a given lens (it
doesn't). The question is, "If I have to use a filter anyways, which one
produces less *additional* flare, a no-coat, single-coat or a multi-coat?" In
all circumstances, increasing the number of glass-air interfaces increases
flare, and putting either an uncoated, SC or MC filter in front of a lens adds
additional flare. The MC lens will minimize the additional in comparison to
the SC (and the SC will add less additional flare than the uncoated filter),
but that's all.
The optimal method for any lens is not to use a filter (two less air-glass
interfaces to worry about), but often that's neither practical nor desireable.
Filters are used for many reasons, but I've never heard of a filter which is
claimed by a manufacturer to reduce flare in the lens assembly it's being
attached to. It can't.
Garth
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