Re: [APML] M13 image

[Dean Jacobsen <deanjacobsen@earthlink.net>]

At 07:11 PM 6/27/2002 -0700, you wrote:
>Dean,
>
>    As I mentioned to Jerry, as soon as I get a device that will allow me 
> to image with a camera lens I am going to shoot a 21 step tablet in 
> moonlight with the CCD... if there is anything that is out of calibration 
> the steps will not be similar to the tablet... this can point out lots of 
> good data, showing where in the density range the color might be getting 
> messed up. This does not equal what the sky color might be, but it is a 
> good check to see if the color I am getting is accurate to a known light 
> source like the sun (reflected off the moon). It's a start...
>
>     Tony

I will look forward to hearing about your results.  As Roland has 
mentioned, Al Kelley's web site is a great resource.

Best Regards,
Dean
www.astrophoto.net



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