it includes precision preloaded polar axis ball bearings.
setting circles, and an extra large polar shaft integrally cast into the base.
#AGENA ASTRO DIAGONAL MANUAL#
And as with all Celestron SCT's, these are truly made in the U.S.A.!A rugged, highly damped fork mount with an adjustable clutched tangent arm Declination manual control, with sand cast drive base makes viewing and astrophotography a delight. The design of these optics offer improved contrast even over traditional f10 Schmidt-Cassegrain telescopes, this is due to the slightly different optical prescription for the primary mirror and secondary mirror system.
And at prime focus magnifications as low as 43X covering 1.17 degree field of view are practical with an optional telecompressor lens this actual field of view can be increased. This focal length still permits a good close-up photo of the entire full moon onto a standard 35mm film format with no need for optional telecompressor (focal length reducing) lense. This increase in aperture over a comparable 8" telescope results in a significant light gathering power 1.34X that of an 8" telescope, and still the telescope remains quite manageable by one person of average stature.
This telescope incorporates an up-dated Schmidt-Cassegrain design of 9-1/4" (235mm) aperture with a nominal focal length of 2350mm resulting in an f10 system. This telescope replaced the "Ultima 8 PEC" telescope and it is a good example of what is possible in a ergonomic SCT geared for astrophotography while also retaining very good observing characteristics. The Celestron Ultima 9-1/4 Schmidt-Cassegrain Telescope introduced in October of 1995 is the first new aperture offered by Celestron since the 1970's.
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