Collimation; Optional Accessories - Celestron 127SLT User Manual

You will find that additional accessories enhance your viewing pleasure and expand the usefulness of your telescope.
For ease of reference, all the accessories are listed in alphabetical order.
Adapter, Car Battery (#18778) – Celestron offers the Car Battery Adapter that allows you to run the NexStar drive
off an external power source. The adapter attaches to the cigarette lighter of your car, truck, van, or motorcycle.
Barlow lens, OMNI 1.25" (#93326) – Double the magnification of any of your Celestron eyepieces with this fully
multi-coated, low profile Barlow lens
Collimation Eyepiece- (#94182) - is ideal for precise collimation of Newtonians and helpful for
aligning SCT and MAK telescopes. This special eyepiece fits into 1¼" focusers or diagonals.
Alignment is easy using the small opening on one end and thin cross hairs at the other end.
Erect Image Diagonal (#94112-A) – This accessory is an Amici prism arrangement that allows
you to look into the telescope at a 45° angle with images that are oriented properly (upright and
correct from left-to-right).
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 50° 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
length: 2.3mm, 5mm, 8mm, 10mm, 12.5mm, 18mm, 21mm, 25mm.
The Eyepiece and Filter Kit (#94303) – contains Five Superior Grade Plössl Eyepieces
- 1.25". Barlow Lens - 2x 1.25". Six Colored Eyepiece (Lunar & Planetary) Filters.
Moon Filter. Aluminum Carrying Case
Flashlight, Night Vision – (#93588) - Celestron's premium model for astronomy, using
two red LEDs to preserve night vision better than red filters or other devices. Brightness
is adjustable. Operates on a single 9 volt battery (included).
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