Re: [APML] anti-pollution dark red filter

[<cschur@cybertrails.com>]

Nicola, that method was tried about 10 years ago by Marc Coco, with
limited success.  You still get funny colored stars this way.  A better
choice would be to use the red filter with tech pan hypered, and use that
for your L channel.  E200 with a Nebular filter also works fairly well,
but you may get purple stars this way.

Chris Schur

> 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
>
>
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo



_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo