Re: [APML] anti-pollution dark red filter

[Stuart Heggie <stuart.j.heggie@sympatico.ca>]

Nicola, I just tried this with my 50mm - 25 minutes on one frame normal, 25 minutes
on the next with the #25 red filter. Kodak Supra 400. I had high hopes but I must
confess that the red filtered image is pretty wild looking. Haven't tried to combine
them but the entire picture is a deep red so I figure so would be the composite.

Stuart

Nicola wrote:

> Dear All,
>
> I'm going to buy soon a dark red filter B+W 091 for my 200mm tele.
> I read on Reeves' book that it is a nice idea do keep the filter on for half the
> exposure time and than unscrewing it to get a normal colour for the background.
> I was wondering if any of you tried to shoot two pictures, one with a red filter
> for all the exposure until skyfog and another one immediately after with no
> filter exposed for less then the skyfog time; after that, replacing the red
> channel of the second photo with the one from the first picture.
> Does it make any sense? Would I get better nebulas?
>
> Cheers
> Nicola
>
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