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Subject: Re: Focus Shift
From: James W. Burrows
Reply To: mapug@shore.net
Date: Sat Feb 17 00:25:10 1996

On Fri, 16 Feb 1996, Jason Ware wrote:

> Welcome to the world of movable mirror SCTs. I've been saying for
> sometime now that some of the pointing accuracy problems are caused
> by mirror movement.

Shoot, and I was just thinking about setting up the tripod on the lawn -
I get that one leg sinking .26 mm (900 mm spread between legs) gives 1'
"image shift". Sounds like lotsa stuff to model!

Jim Burrows