Re: Re: [APML] Beta Scorpi nebulosity

[lkt <tan@cox.net>]

Dave,

 I am not sure stacking 3 TP luminance would help much. I think the main problem with this image is the low SNR. The reflection nebulosity is very faint with respect to the background sky. Certainly darker skies will help but apart from that, a filtered blue as you suggested will also help, but only in the blue channel. I have a feeling that once you merge back with the R and G channels, you back to the same SNR. Nevertheless, the blue TP filtered exposure will have better grain. I could be wrong.

Loke

 

> 
> From: Aplanatic@aol.com
> Date: 2003/06/19 Thu PM 05:56:33 EDT
> To: astro-photo@seds.org (Discussion of Film Astrophotography)
> Subject: Re: [APML] Beta Scorpi nebulosity
> 
> Loke,
> 
> If I image this object again, I'll take at least three 90-minute exposures on TP, stack them and then combine with the original PPF image.  That's the way to get more detail and dynamic range from this object, IMHO.
> 
> Yes, it would be nice to reduce the sky background using a filter.  One could use a blue filter on the TP exposures and then replace the blue channel of the PPF exposure with the filtered TP exposures, creating a high contrast, high dynamic range color image.
> 
> Dave
> 


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