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Optional Accessories • 69
prime focus long-exposure astrophotography. It makes guiding easier and
exposures shorter.
Sky Maps (#93722) - When learning the night sky, the Celestron Sky Maps
offer the ideal solution. The maps include all the constellations and brighter
deep-sky objects. The maps are printed on a heavy stock paper that is
moisture-resistant. On the front cover is a rotating planisphere which indicates
when specific constellations are visible.
Skylight Filter (#93621) - The Skylight Filter is used on Celestron Schmidt-
Cassegrain telescopes as a dust seal. The filter threads onto the rear cell of
your telescope. All other accessories, both visual and photographic, thread
onto the Skylight Filter. Although it does cut down on a portion of the incom-
ing light, it is a very small amount. It should be noted, that most Barlow lenses
can NOT be inserted into the visual back when the skylight filter is attached.
T-Adapter (#93633-A) - A T-Adapter (with T-Ring) allows you to attach your
camera to the prime focus of a Celestron Schmidt-Cassegrain telescope. This
is used for terrestrial photography and short exposure lunar and filtered solar
photography. It can be used for long exposure deep-sky photography if you
use a separate guidescope.
T-C Adapter (#93636) - This adapter allows you to couple a video or movie
camera to a telescope. The camera must have a removable lens with a
standard “C” thread. The T-C adapter threads into the camera and then onto
the T-Adapter.
T-Ring - The T-Ring couples your camera body to the T-Adapter, Radial Guider
Body, or Tele-Extender. This accessory is mandatory if you want to do astro-
photography through the telescope. Each camera make (i.e., Minolta, Nikon,
etc.) has its own unique mount and therefore, its own T-Ring.
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 and 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).