[Aavso-photometry] Screen for "dome" flat?

[Jeff Hopkins]

Hi Jim,

I have a roll off roof also. I use a poster paper cardboard sheet 
that seems to work well. I illuminate it with a couple of 150 lights 
from Harbor Freight.I then have a thin sheet of whit plastic to act 
as a further defuser over the corrector plat of my LX200 SCT.  While 
it may not be ideal. it seems to work. I have experimented with 
several methods, including a light box. I like the twilight flats, 
except I run out of time and you must have everything set from a 
previous night as these are taken at the start of an evening (unless 
you are an early morning observer.

Good luck.

Jeff

At 07:41 -0700 05/11/2008, Jim Roe wrote:
>Thinking about installing a screen of some sort for taking "dome" flats
>("dome" being VERY generic in this case.  I have a roll-off shed that is
>not very domish.).  What are suggestions for material, paint(?),
>illumination, etc.  Right now I am using C, B, V, and I filters.
>
>Jim Roe [ROE]
-- 
Jeff Hopkins
HPO SOFT
Counting Photons
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Hopkins Phoenix Observatory
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