Re: [APML] Mr.Zangs comment

["Frank Barrett" <frankb@celestialwonders.com>]

Alen,

You are right.  Here's an unprocessed full frame M45 taken with the C8 and
a Meade f/6.3 focal reducer:
http://www.celestialwonders.com/M45-60m.jpg

I'm guessing he omitted the fact that a focal reducer was used...he does
mention Anti-Vignetting in the processing section, which would probably
not be necessary at f/10 with a GEG.

Frank
http://www.celestialwonders.com

> Speaking of image scale with an SCT, I'd like to
> direct the group's attention to the following entry
> in the SCT Imaging contest, open to members of the
> Yahoo! SCT mailing list (see contest rules). I'm *not*
> trying to discredit the photo - it's a fine one! -
> or the photographer, just to point out another
> apparent discrepency in scale vs. focal length.
> The object is M45, with all of the seven sisters in
> the 35-mm frame. But the info says it was taken with
> a 10" Meade f/10 SCT *at f/10*. I stress the "at f/10"
> because I am really suprised M45 would fit in the
> frame at this focal length. Now, he does say he used
> a Lumicon GEG, so perhaps he simply forgot that he
> he was also using the companion Lumicon focal
> reducer. That's got to be the explanation. I'd
> e-mail the photographer to ask, but I couldn't find
> his e-mail address among the 2800+ members of that
> group!
>
> http://www.nexstar11.com/contest/michaelledesma-filmpf.html
>
>
>
> __________________________________
> Do you Yahoo!?
> The New Yahoo! Search - Faster. Easier. Bingo.
> http://search.yahoo.com
> _______________________________________________
> 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