>Neuman - Ruether wrote in message
>news:3d2fcf00.23996050@newsstand.cit.cornell.edu...
>> On 11 Jul 2002 13:55:15 GMT, shadcat11@aol.com (ShadCat11)
>> wrote:
>>
>> >< >> >significant proportion of the lens price does
>> >not make sense... Hoya filters are good, but
>> >I prefer the single-coated versions to the
>> >more expensive and hard to clean multi-coated
>> >versions (and I use these on my "expensive"
>> >Nikkors, too...;-). I avoid Tiffen, when
>> >possible...
>> >
>> >David Ruether>>

>> >In 47 years of photography have never observed an optical problem with
>any
>> >brand filter. Still, I prefer B&W and Nikon filters for the brass
>mounts,
>> >which don't bind with aluminum threads on the lenses. Also, I have had
>cheaply
>> >made filters fall apart on me, but never a B&W or Nikon. I beat the
>higher
>> >cost of quality filters by rummaging for used ones in good shape at local
>photo
>> >shops, where they sell for a fraction of the price of new ones.
>> >
>> >What is the problem with Tiffen filters? So far, all I have owned seemed
>> >comparable to Hoya, if not B&W.
>> >
>> >Allen Zak

>> Another of my posts covers it:
>>
>> For as long as I can remember, I avoided Tiffen
>> filters 'cuz:
>> - they tend to "self-fog" in a couple of months,
>> giving unintended diffusion effects until cleaned.
>> - they are often uncoated many-layer sandwiches
>> instead of coated single-layer dyed glass.
>> - they come in really thick rims, which often
>> vignette on wide-angle lenses.
>> For as long as I can remember, Hoya has (mostly - I
>> avoid the plastic-rimmed versions) produced
>> high-quality filters in good rims at reasonable
>> prices. I do avoid their hard-to-clean multi-coated
>> filters, though, and use Hoya single-coated filters
>> along with my Nikkor filters...
>> David Ruether

On Fri, 12 Jul 2002 11:33:13 +0200, "Dj" wrote:
>
>So what is the advantage of (multi)coated filters.
>Less flare but harder to clean?

Not even really the first, except under unusual conditions.
The front of the filter does not need to be coated at all,
assuming that nothing will be placed in front of it; the
rear coating may help in extreme axial lighting conditions,
but most reflection problems will be solved by the
multicoating on the front of the front element of the lens.

>And are the standard Hoya and B+W filters single coated or not coated at
>all.

Both are at least single coated, sufficient for most
purposes...

>And for something like a uv filter does it all really matter, ie. brand and
>coating?

I prefer single coating rather than no coating or
multicoating for the UV (protection) filter, and
a good metal rim (either brass or painted to prevent
sticking) that is strong enough to resist deforming,
but is not too thick in either direction, which can
cause vignetting. The glass must also likely be flat.
Hoya is sufficient to cover the above...
Also, UV filters vary slightly in color among brands
(though far less so than "skylight" filters), so it
may be desirable to stick with one or two brands
of filters for lenses if your lenses color-match
well (this is a minor concern, though...).