Archived posting to the Leica Users Group, 1999/05/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 12:21 PM 5/26/99 -0400, you wrote: > Whew! >Long post! But interesting! >Insofar as UV absorbing cement- The fact is that glass, even optical glass >absorbs most UV- that's why you don't get a very good tan through a glass >window! Wait a minute, there, Dan'll...I've gotten BURNS on my left arm on long drives with the window closed... >And should you want to do UV photography, where UV is used to make the >image, the only lens that is useful there, is a lens, the elements being >made of quartz crystal. Hasselblad had one used mainly for questioned >documents examination, and ran about 6 or 7000 USD about 20 years ago. >In photofinishing, the only problems I find with UV comes from disposables >with plastic lenses, and some P&S cameras with plastic lenses. Mainly the >disposables- outdoor photos sometimes require that 'yellow' be added to a >print since the UV really stimulates the blue sensitve layer more than the >others. >Dan >