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OPTIONAL ACCESSORIES
You will find that additional accessories enhance your viewing pleasure and expand the usefulness of your
spotting scope. For ease of reference, all the accessories are listed in alphabetical order.
Advanced GT German Equatorial Mount (#91518) – Turn your
80ED spotting scope into a wide field photographic instrument or high
power planetary telescope, with the addition of this computerized EQ
mount. This new German Equatorial mount has precision worm gears
on both axes for extremely smooth stability. The key element that makes
this system the most stable in its class is the re-designed heavy-duty
tripod with larger and more substantial legs that offer excellent damping
characteristics for more stable views.
Barlow Lens - 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. 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. The OMNI Barlow
(#93326) is a compact achromatic Barlow lens that is under three inches
long and weighs only 4 oz. It works very well with all Celestron
eyepieces.
Diagonal 2" Mirror (#93519) - Celestron offers a 2" 90° Mirror Diagonal to thread on Schmidt- Cassegrain
telescopes or slides into the barrel of a 2" focuser. This diagonal includes an adapter to accept 1¼" eyepieces. It
has a multicoated mirror and smooth mechanics that are precision manufactured for reliability
Eyepieces - Like telescopes, eyepieces come in a variety of designs. Each design has its own advantages and
disadvantages. For the 1-1/4" barrel diameter there are four different eyepiece designs available.
• OMNI Plössl - Plössl eyepieces have a 4-element lens designed for low-to-high power observing. The
Plössls offer razor sharp views across the entire field, even at the edges! In the 1-1/4" barrel diameter, they
are available in the following focal lengths: 4mm, 6mm, 9mm, 12.5mm, 15mm,
20mm, 25mm, 32mm and 40mm.
• X-Cel - This 6 element design allows each X-Cel Eyepiece to have 20mm of eye
relief, 55° field of view and more than 25mm of lens aperture (even with the
2.3mm). In order to maintain razor sharp, color corrected images across its 55° field
of view, extra-low dispersion glass is used for the most highly curved optical
elements. The excellent refractive properties of these high grade optical elements,
make the X-Cel line especially well suited for high magnification planetary viewing
where sharp, color-free views are most appreciated. X-Cel eyepiece come in the
following focal lengths: 2.3mm, 5mm, 8mm, 10mm, 12.5mm, 18mm, 21mm,
25mm.
• Ultima - Ultima is our 5-element, wide field eyepiece design. In the 1-1/4" barrel diameter, they are
available in the following focal lengths: 5mm, 7.5mm, 10mm, 12.5mm, 18mm, 30mm, 35mm, and 42mm.
These eyepieces are all parfocal. The 35mm Ultima gives the widest possible field of view with a 1-1/4"
diagonal.