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Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.

Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.
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Hot Mirror filter
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Posted: Fri Apr 08, 2011 8:30 am
Post subject: Hot Mirror filter
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Posted: Fri Apr 08, 2011 8:30 am
Post subject: Hot Mirror filter
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Has anyone tried these filters? For IR sensitive cameras, it is meant to improve WB, colour accuracy and reduced colour noise in low light where there is a strong IR source.

http://www.pbase.com/slockhart54/ir_pollution_d70

http://forums.dpreview.com/forums/readflat.asp?forum=1039&message=29158482&changemode=1

http://forums.dpreview.com/forums/readflat.asp?forum=1021&message=35244572&changemode=1

http://diglloyd.com/articles/Infrared/compare-S3-5D-D70-examples.html

http://www.berndmargotte.com/technical/m8_infrared_en.html


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Posted: Sat Apr 09, 2011 11:17 pm
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Posted: Sat Apr 09, 2011 11:17 pm
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I use such filters, especially the excellent Baader UV / IR Cut filter for my work, if I need a pure VIS image (when using a full spectrum converted DSLR).

The famous Leica M8 IR leakage problem was also cured using a similar Cut Filter.

Ideally such a filter should look like this:



as DSLRs are not sensitive beyond 1000nm, that transmission beyond has no negative impact.
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