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Re: [ATM] Secondary Cage Sizing?
On Monday 19 April 2004 01:21 pm, Richard Schwartz wrote:
> 75% illumination is very BAD if you are doing photometry by brightness
> comparison.
Leave it to Richard to come up with the exception to the rule! OTOH, you'll
find some commercial dobs with edge illuminations of nearly 70%, in order to
keep secondary size down. I assumed Matt was building for casual observing.
If not, mea culpa.
Clear skies.
--
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net
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