53
Polarizing Filter Set (#93608
) -
The polarizing filter set limits the transmission of light to a specific plane, thus
increasing contrast between various objects. This is used primarily for terrestrial, lunar and planetary observing.
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 NexStar 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.
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. Even 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 NexStar
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 the NexStar 5i (#94139) and the
NexStar 8i (#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 NexStar. This turns your NexStar 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.
