Re: [APML] new BRC shot

[Philip Perkins <philip@astrocruise.com>]

Bobby,

This is an excellent image.  You recorded just as much faint nebulosity as 
I did in my 4-stack on PPF:
http://www.astrocruise.com/m8-20.htm

I guess we both pushed the exposure quite close to the sky fog limit.  I 
think the difference is that in my case the object is much lower (about 20 
degress max elevation) so the maximum exposure I can use is around 40 
minutes at f/7 whereas I see that you went for 50 minutes at f/5, so your 
effective exposure was 2.5x mine.  It's a good result, especially for a 
single frame, and shows that E200 can work well.

In terms of future 120 films, I also think that Fuji may be the way forward 
- I have some NPH 400 that's still quite fresh and shows great promise. I 
don't know if they still make this particular film but when I get some time 
I'll do a little research to see what's available.

--Philip


At 03:53 13/10/02 -0500, you wrote:
>Thank you Loke. The 6x9 Toya is great; only it is not mine. It is on loan to
>me from Gene Horr who has been gracious enough to let me use it to help
>diagnosis some focal plane issues. I wanted to use a vacuum back camera to
>make sure the apparent miscollimation was actually that and not film warp.
>It would be a lot better if there were some great film to put in it <g>
>Bobby


Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com


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