Re: [APML] OT: Question for Canon 10D owners

[<apml@beskeen.com>]

> Most of us are simply exposing longer to get a good H-alpha signal.  Even
if
> it's 10X longer, well, I guess I'm no worse off than with the reciprocity
> failure of film.  However, there are also those who are looking to replace
> the stock IR cut-off to deal with this issue.  (In the 300D it can be
> removed supposedly without destroying the camera, although it will void
the
> warranty and render the camera useless for terrestrial photography.  One
> also needs to replace it with some kind of IR cut-off, although preferably
a
> less aggressive one.)

Surely IR filters are only required for refractors, not reflectors? (not
sure what effect the collector plate on an SCT might be tho)

One possible option for temporary conversion back to terrestrial photography
is to mount an IR filter on the front of your lens - although its unclear
how well the filter used would have to match the characteristics of the
original IR filter. May effect the white/color balance - any ideas folks?

Looking for more info on the web provides a japanese site with pictures from
a 300d with the filter removed - Ha response, hell yeh!
http://www.seo-e.co.jp/hobby.htm

Cheers, Paul.


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