"Thomas M" wrote in news:h1w1c.60320$A12.50960@edtnps84:


"David Knisely" wrote in message
...
Thomas M wrote:

I thought the SCT principle was much younger than that...its an F6
SCT
in
the article

The reflector in the article is not an SCT. It is a simple
Cassegrain, possibly Classical or Gregorian, as the Gregorians were
often resorted to during the era of the "brass" telescope (the tube
length argues for a Gregorian). The SCT is a different and much more
recent design (circa
1962)
using spherical optics and a large corrector plate. Clear skies to
you. --


Some of you have a real bad habit of splitting hairs...the concept or
priciple is the same!



So do you call your SCT a Classical Cassegrain?

Llanzlan.