Re: [APML] M57 RED

["Brian Lula" <brianl@polytecpi.com>]

Hi Tony,

WOW! ...that's a stunning image. Looking foward now to your RGB composition! What 
made you go with 30 x 7min as opposed 15 x 14 or 7 x 30min exposures? 

Thanks, Brian



On 2 Sep 02, at 10:20, Tony Hallas wrote:

> Hello,
> 
>     Please excuse this CCD post on the APML but thought you might be interested to see the
>     mantel that shows up in the red exposure (working on the G and B...) of the very common
>     M57... the density difference is something like 1:1000 between the mantel and the "regular"
>     part of M57... if I did not burn down the central part it would be pure white. 
> 
>      http://www.astrophoto.com/M57.jpg
> 
>      Have a good one,
> 
>           Tony




Brian Lula
Polytec PI, Inc.
(508) 832-3456

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