Hi Richard,
that's what I figured.
By the way there is an interesting comparison on the 40D and 50d at:
http://www.astrosurf.com/~buil/50d/test.htm
Christian is pretty good at that.
Take care
Dieter

--- In Astroimaging_filters@yahoogroups.com, "ssb73q" <ssb73q@...> wrote:
>
> Hi Dieter, I forgot to mention that my Canon 350d has been modified.
> The internal UV/IR cut filter was replaced with clear glass. I'm not
> sure, but I suspect that because of the internal UV/IR cut filter
> that an unmodified Canon 30D only responds to 400-640nm wavelengths.
>
> I'm Sorry if I mislead you.
>
> Regards,
> Richard M
>
>
> --- In Astroimaging_filters@yahoogroups.com, "dieterkuespert"
> <metalflash@> wrote:
> >
> > Hi Richard,
> > thanks, quite interesting.
> > I'm planning to use a Canon 30D. It should work in the filter range.
> > We'll try to take some Jupiter atmosphere pictures.
> > I'll look also for Richard (M) recommendations.
> > Thanks a lot
> > Dieter
> >
> >
> <<snip>>
>