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Hi Kevin, you had me straching my head there for a few moments , you are correct the FOV is the same in both scopes in the artical, where I went wrong was with the calculation of the scope I am building, mine is only masked down to 6" and I used these figures comparing them to the artical's figures, I was never any good at math anyway :-))
Where this design really shines other than what you have already mentioned about ease of building, is the fast lens you get for imaging.
The artical mentions imaging in 15mins this was 10 years ago, with the better films today the time is cut to about 6 or 7 mins even much less with CCD or digital cameras.
This makes for easy guiding especialy if you are handguiding, I know whats it's like to sit there for an hour and manually guide, no fun at all :-))
The long tube is a pain to use but the final result is definatly worth it.
The production model Celestrons of the 80's ( not exactly the same scope but similar) still fetch high price's in the US, around $1500.00 or more and are in high demand this was the Schmidt Camera with a corrective lens.
I think the main problem with them at the time was that people didn't want to mess around with single pieces of film the Wright /Schmidt design did away with this and there are still lots of photographers using them.
cheers
David.
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