Archived posting to the Leica Users Group, 2000/02/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Peter, Good post- sorry my previous message may have been harsh- looks like you'll get along here just fine! I for one will be interested to see if Leica answers your question..... Bob (I don't use filters...I have some series 7's, but haven't seemed to use them...) Keene >Date: Thu, 10 Feb 2000 13:47:49 +1100 >From: "Peter Zak" <pzak@desidero.com.au> >Subject: [Leica] UVa Filter unwanted effects. > >Ted, thanks for your words..... > >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. > >Regards, > >Peter Zak.