Re: [ATM] How fast is too fast?

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

The use of relay lenses will help immensely in getting the image out of the
beam.  IN addition, the use of Barlow lenses (negative lenses) will extend
the focal length of a primary and also help in getting the image out of the
incoming beam.
BTW, my previous post indicated that the secondary size for a F2 would be
1/2 of the diameter of the primary, it really should have read 1/4 the
diameter at a minimum.  Same basic with the F3 at !/6 of the diameter.  I
just wasn't thinking quite properly at that moment.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net

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