Celestron CGE1100 - Manual (Page 56)

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Radial Guider (#94176) - The Celestron Radial Guider® is specifically designed for use in
prime focus, deep sky astrophotography and takes the place of the T-Adapter. This device
allows you to photograph and guide simultaneously through the optical tube assembly of
your telescope. This type of guiding produces the best results since what you see through
the guiding eyepiece is exactly reproduced on the processed film. The Radial Guider is a
“T”-shaped assembly that attaches to the rear cell of the telescope. As light from the
telescope enters the guider, most passes straight through to the camera. A small portion,
however, is diverted by a prism at an adjustable angle up to the guiding eyepiece. This
guider has two features not found on other off-axis guiders; first, the prism and eyepiece
housing rotate independently of the camera orientation making the acquisition of a guide
star quite easy. Second, the prism angle is tunable allowing you to look at guide stars on-axis. This accessory works
especially well with the Reducer/Corrector.
Reducer/Corrector (#94175) - This lens reduces the focal length of the telescope by
37%, making your CGE 11 a
1764 mm f/6.3 instrument and the CGE 8 a 1280mm f/6.3 instrument . In addition,
this unique lens also corrects inherent aberrations to produce crisp images all the way
across the field when used visually. When used photographically, there is some
vignetting that produces a 26mm circular image on the processed film. It also increases
the field of view significantly and is ideal for wide-field, deep-space viewing. It is also
perfect for beginning prime focus, long-exposure astro photography when used with the
radial guider. It makes guiding easier and exposures much shorter.
RS-232 Cable (#93920) –
Allows your CGE telescope to be controlled using a laptop
computer or PC. Once connected, the CGE can be controlled using popular astronomy
software programs.
Sky Map
s (#93722) - Celestron Sky Maps are the ideal teaching guide for learning the night sky. You wouldn’t set off on a
road trip without a road map, and you don’t need to try to navigate the night sky without a map either. E ven if you already
know your way around the major constellations, these maps can help you locate all kinds of fascinating objects.
Skylight Filter (#93621) -
The Skylight Filter is used on the Celestron CGE telescope as a dust seal. The filter threads onto
the rear cell of your telescope. All other accessories, both visual and photographic (with the exception of Barlow lenses),
thread onto the skylight filter. The light loss caused by this filter is minimal
.
Solar Filter - The AstroSolar® filter is a safe and durable filter that covers the front opening of the telescope. View
sunspots and other solar features using this double-sided metal coated filter for uniform density and good color balance
across the entire field. The Sun offers constant changes and will keep your observing interesting and fun. Celestron offers
filters for
CGE GPS 8 (#94162).
T-Adapter (#93633-A) - T-Adapter (with additional T-Ring) allows you to attach your SLR camera to the rear cell of your
Celestron CGE. This turns your CGE into a
high power telephoto lens perfect for terrestrial photography and short
exposure lunar and filtered solar photography .
T-Ring - The T-Ring couples your 35mm SLR camera body to the T-Adapter, radial guider, or tele-extender. This
accessory is mandatory if you want to do photography through the telescope. Each camera make (i.e., Minolta, Nikon,
Pentax, etc.) has its own unique mount and therefore, its own T-Ring. Celestron
has 8 different models for 35mm cameras.
Tele-Extender, Deluxe (#93643) - The tele-extender is a hollow tube that allows you to attach a camera to the telescope
when the eyepiece is installed. This accessory is used for eyepiece projection photography which allows you to capture very
high power views of the Sun, Moon, and planets on film. The tele-extender fits over the eyepiece onto the visual back. This
tele-extender works with eyepieces that have large housings, like the Celestron Ultima series.
A full description of all Celestron accessories can be found in the Celestron Accessory Catalog (#93685).