Re: opaque filter inside slr

[ADavidhazy <ANDPPH@xxxxxxxxxxxxxxxxxx>]

> I recently read an article about IR photo, talking about putting a gel
> filter "somewhere" behind the mirror of SLR camera, for avoiding the on and
> off of the opaque filter. Few questions about that:
> 1. can I do that myself, is it easy?
> 2. where exactly in the camera, from the front or the back?

Check out this article on the web for details. 

          http://www.rit.edu/~andpph/text-infrared-action.html

> 3. where can I find that kind of filter, is it expensive?

WJMarkerink the owner of this list offers the less expensive variety. Or, you
can buy gelatin Wratten filters from most professional camera supply stores
although they may have to special order them. Most large on-line camera stores
such as Cambridge, Porter's, Ritz, etc. may also carry the IR filers such as
the 70, 87, 88, 87C, etc. If you are just a beginner you have a lot of
information to accumulate. The Wratten filter are expensive IMO - maybe
something like $20-25 for a 3" square filter.

Many photographers just use a deep red filter over the camera lens and this
works for their purposes. A filter such as the Wratten 25 or 29.

good luck,

Andrew  o o  0 0 o . o  Davidhazy, Imaging and Photo Tech
         \/\/\/\/\/\/          http://www.rit.edu/~andpph
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