IR-Filters

[montespluga]

hi does anybody has experience (or links) about the different IR-Filters ?? I'm not into it, but might be interesting to me. Thanks, montespluga

[Robert J Pellegrino]

You can give this a try for a starting point. http://www.schneideroptics.com/filters/list/7/ir2.html

[montespluga]

thanks Bob

did you made experience with it ?? As I understand IR-Photography, it does bring some new features, meanwhile its a bit tricky: Am I wrong ?? My intention would be using it for architectual photography. regards: montespluga

[Robert J Pellegrino]

I have done some work with IR filters and Ilford SFX. SFX is a near infrared film i.e. extended red sensitivity range towards the IR. When you use an IR filter that does not pass visible light, you'll need to experiment with numerous levels of exposure. You will find that most true IR films do NOT carry an ISO rating; it is a trial and error affair at first. As I use an Arca-Swiss 6x9 with roll film, the multiple exposure tasks are a bit more convenient than with sheet film. You might want to give the SFX film a try without an IR filter it is rated at 200 ISO and provides results similar to HP4 Plus. Standard red filters for black and white film, will produce a more intensified filter result than would be the case with standard pan film. You can then work into using the various IR filters and compare the results on a single subject. As I said before roll film does help simplify this process, you can take a baseline shot on frame 1 with no filter and normal metered exposure at ISO 200 then work into the various filters and exposures on the same roll. I hope this helps.

[Gene Crumpler]

Check out the Infared Mailing List at;

http://www.pauck.de/archive/mailinglist/infrared/mhonarc/idx_thread1.h tm#12910

[Michael S. Briggs]

Try this link and the links you will find thereon: http://www.pauck.de/marco/photo/infrared/infrared.html

The only available LF IR film is made by Maco and doesn't go as deeply into the IR as the former Kodak product. To get a dramatic IR effect of white vegatation (the Wood effect) you will need to use a filter that is almost or completely opaque to visible light. One example is the B+W filter 092, which cutoffs wavelengths below about 680 to 710 nm. Maco has a table of filter recomendations: http://www.thn.net/~maco/TAIRe.htm.

[montespluga]

Thanks a lot. It's so much material that it takes to me a while to study it. As a little information: http://www.cocam.co.uk/CoCamWS/Infrared/INFRARED.HTM which was the best source I did find. (Big manual) montespluga