Ultima 9
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and Ultima 11 Manual
OPTIONAL ACCESSORIES
The following is a partial list of optional accessories that can be used with your Celestron telescope.
Accessory Case (#93500) - This rugged ABS plastic case is designed for carrying a few accessories. Inside
is foam padding that is die cut to l x l inch squares. These squares can be removed to accommodate
accessories with a custom fit.
Advanced Astro Master (#93900) - Imagine observing hundreds of deep-sky objects in one night. With
the Advanced Astro Master you don't have to imagine! This unique accessory contains a data base of more
than 10,000 objects! Included are the Messier catalog, NGC catalog, IC catalog, portions of the ESO
catalog, portions of the UGC catalog, special non-stellar catalog which contains objects not found in any of
the other catalogs, a star catalog containing 241 interesting double and multiple stars, and a user definable
catalog that allows you to enter 25 of your favorite objects. And, scrolling information cross references Sky
Atlas 2000.0 or Uranometria . Unlike other digital setting circles, which require the use of a clock drive,
the Advanced Astro Master can be used with or without a clock drive. All you have to do is align on any
two of the 28 navigational alignment stars in the Advanced Astro Master's data base and you are ready to
observe. Once aligned, the system keeps track of where it is pointed. And, the Advanced Astro Master now
has an RS 232 port for complete interface to your personal computer. The RS 232 cable (#93921) is
currently available and ready for shipment.
Barlow Lenses - A Barlow lens is a negative lens that increases the focal length of a telescope. Used with
any eyepiece, it doubles the magnification of that eyepiece. Celestron offers two Barlow lenses in the 1-
1/4" size for the C8 telescope. The 2x Ultima Barlow (#93506) is a compact triplet design that is fully
multicoated for maximum light transmission and parfocal when used with the Ultima eyepieces. It works
very well with all Celestron eyepieces. The latest Barlow to be added to Celestron's product line (#93507)
is a low profile achromatic design. It weighs just 4 oz. and it is under 3" in length.
Collimated Barlow Diagonal-1
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(94117) - An ultra compact 90º barlow diagonal. It contains an integral
1.7X large aperture multi-coated achromatic Barlow lens. The diagonal is laser aligned (collimated) for
rotating centration. Ideal for visual centering of CCD objects and critical setting circle use.
Counterweight Bar Assembly (#94192) - When attaching optional accessories to your 11" telescope, like
2" eyepieces or cameras, there is the need to add weights to counterbalance the telescope. This unique
design produces the best dynamic balance of any counterweight system on the market. Not only do the
weights slide parallel to the telescope tube, but they can also be adjusted vertically. Included is one 2.5
pound weight. Additional counterweights are available in 2.5 (#94193) and 5 pound (#94194) sizes.
Dew Eliminator (#94122) - The Dew Eliminator blows warm air to keep your corrector plate and any
optional accessories dew-free.
Diagonal, 2 inch (#93519) - Like the l-l/4" Diagonals, the 2" Star Diagonal allows you to use 2" eyepieces
with your Celestron telescope. These larger eyepieces offer wider fields and better eye relief for greater
viewing comfort.
This accessory is NOT recommended for use with the Reducer/Corrector Lens.
Erect Image Diagonal (#94112-A & 94108) - For daytime terrestrial viewing the Erect Image Diagonal
produces images through your Fastar that match what you see with the unaided eye. This accessory uses an
Amici prism arrangement that corrects the image. The model #94112-A allows you to look into the
telescope at a 45° angle, a desirable arrangement for terrestrial viewing. If you desire to view at a 90º
angle, then model #94108 is available.
Eyepiece Filters - To enhance your visual observations of planetary objects, Celestron offers a wide range
of colored filters that thread into the 1-1/4" oculars. Available are: #12 Deep Yellow, #21 Orange, #25 Red,
#58 Green, #80A Light Blue, #96 Neutral Density (25% T and 13% T) and Polarizing filters. Filters are
also available in sets of four.
Eyepieces - Like telescopes, eyepieces come in a variety of designs. And, with the advent of different
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