Re: [ATM] Crayford focuser protrusion problem

["Bob May" <bobmay@nethere.com>]

Theory says that there will be an obstruction that will degrade the image a
bit but reality says that there will be nothing happening.
The obstruction will block off some light to the edge of a part of the
primary. This will produce diffraction to the image as well as being an
obstruction.  The diffraction will be very minor (it's not a very large set
of edges that will cause any effects as well as being way off of the center
of the image) as well as the little bit of actual obstruction.
Bob May
http://nav.to/bobmay
bobmay@nethere.com
NEW! http://bobmay.astronomy.net


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