[AZ-Observing] Re: Flats and Bias
- From: Stan Gorodenski <stan_gorodenski@xxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Tue, 17 Jul 2007 19:21:42 -0700
Brian Skiff wrote:
>
>
>>> would placing a sheet of red cellophane
>>> over the objective end of the telescope work...?
>>>
>>>
>
> Folks have tried all sorts of subterfuges....
>
>
Have they tried shooting the telescope and ccd camera down a very long
vertical shaft? At the right speed the wavelength should match the
wavelength of the red sky color of a night sky.
Stan
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