In article <5e0o15$d63@lastactionhero.rs.itd.umich.edu>, calvin@umich.edu says...

>>If you are going to use a UV filter for lens protection, you should spring
>>for a B+W multicoated one. I have one, and it's about as harmless to the
>>image as you'll ever get. Reflections are extremely low in amplitude, and
>>the glass is clear and flat too.
>>If you cannot afford to buy it, then your lens is probably not worth
>>protecting either.

>I am looking for the best filter to protect the lens of my Konica
>Hexar. Which one would you recommend? Please specify size and
>make.

This keeps coming up, but......
An inexpensive Hoya multi-coated filter, for ALL *practical* purposes,
is as good as is required for the most critical use (NO discernable image
sharpness degradation...). If you feel that you must spend more money,
the Heliopan and B&W filters are equally good, as are the even more
expensive, excellent (and equally good...) Nikkor filters...
And BTW, UV filters are protection devices only - they do not "cut haze"
(since most lenses themselves do not pass enough UV to matter).
Hope This Helps