Re: [Leica] UVa Filter unwanted effects.

[John Collier <jbcollier@home.com>]

First you slag us ( well I guess someone had to ) and then you mention the
F***** word. Oh my G**.  Everybody duck!

John Collier

Don't worry you'll be made welcome now.  ;-)

> From: "Peter Zak" <pzak@desidero.com.au>
> Date: Thu, 10 Feb 2000 13:47:49 +1100
> Subject: [Leica] UVa Filter unwanted effects.
> 
> I'm well aware of the debate on UVA filters re: Protection vs Image
> degradation, but
> 
> I've noticed that the UVA filters on my 35mm and 90mm Summicrons are giving
> unwanted reflections as night.
> 
> I've shot some night scenes of Sydney Australia and I can read the neon
> naming signage duplicated up in the Sky (reversed).
> 
> The same shots without the UVA filters are OK.
> 
> I've taken with Leica-AG, their response is:
> 
> "All our filters have multi-layer coatings to reduce reflection at the
> glass-air planes.  So we reduce the intensity of the reflected light to a
> very low level.  But it is not possible to suppress the reflections totally.
> If there is a motive with a very high contrast ie.  Lamps at night, you can
> see the faint reflexes of the lamps easily on the dark background of the
> night"
> 
> Ok, so the solution is (surprise, surprise) take to UVA filters off for
> night shooting.
> 
> But my question is - why have I never noticed this in 7 years of Nikon
> shooting using some very cheap and nasty UVA filters at all times (ie
> non-HMC Hoya, Arrow !!).  A $15 filter doesn't have this problem, a $200 one
> does ??.
> 
> I have sent an email back to Leica asking the same question.  I will post
> the response when it arrives.
>