----- Original Message -----
From: "Joseph McAllister"
Subject: Re: 2000 mm reflex lens
Oh, but they've brought into the 20th century, and added a tripod
collar to save the poor camera mount plate.
And how can a reflex lens have 8 elements in 6 groups? My 2000mm ƒ10
Celestron 8" has a mirror, and a secondary mirror. They must have
packed a few elements into the small barrel to magnify the image from
a 6" design to make it 2000mm.
There are 5 elements behind the rear mirror. Whether they are acting as a
teleconverter of sorts or are corrective elements I don't know.
William Robb
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