Instruction manual

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• Super Modified Achromatic (SMA) Eyepieces: 1-1/4"
The SMA design is an improved version of the Kellner eyepiece. SMAs are very good, economical,
general purpose eyepieces that deliver a wide apparent field, good color correction and an excellent
image at the center of the field of view. Celestron offers SMA eyepieces in 1-1/4" sizes in the
following focal lengths: 6mm, 10mm, 12mm, 17mm and 25mm.
• Ultima - Ultima is not really a design, but a trade name for our 5-element, wide field eyepieces. In the
1-1/4" barrel diameter, they are available in the following focal lengths: 5mm, 7.5mm, 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 and is ideal for the NexStar with or without the
Reducer/Corrector.
• NexStar 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: 3.6mm, 6mm, 8mm, 10mm, 13mm,
17mm, 25mm, 32mm and 40mm.
• Lanthanum Eyepieces (LV Series) - Lanthanum is a unique
rare earth glass used in one of the field lenses of this new
eyepiece. The Lanthanum glass reduces aberrations to a
minimum. All are fully multicoated and have an astounding
20mm of eye relief — perfect for eyeglass wearers! In the 1-1/4" barrel diameter, they are available in
the following focal lengths: 2.5mm, 4mm, 5mm, 6mm, 9mm, 10mm, 12mm and 15mm. Celestron also
offers the LV Zoom eyepiece (#3777) with a focal length of 8mm to 24mm. It offers an apparent field of
40º at 24mm and 60º at 8mm. Eye relief ranges from 15mm to 19mm.
Eyepiece Filters - To enhance your visual observations of solar system objects, Celestron offers a wide range of
colored filters that thread into the 1-1/4" oculars. Available individually are: #12 deep yellow, #21 orange, #25
red, #58 green, #80A light blue, #96 neutral density - 25%T, #96 neutral density - 13%T, and polarizing. These
and other filters are also sold in sets.
Night Vision Flashlight - (#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).
Red Astro Lite – (#93590) – An economical squeeze-type flashlight fitted
with a red cap to help preserve your night vision. Remove the red cap for
normal flashlight operation. Very compact size and handy key chain.
Light Pollution Reduction (LPR) Filters - These filters are designed to
enhance your views of deep sky astronomical objects when viewed from
urban areas. LPR Filters selectively reduce the transmission of certain wavelengths of light, specifically those
produced by artificial lights. This includes mercury and high and low pressure sodium vapor lights. In addition,
they also block unwanted natural light (sky glow) caused by neutral oxygen emission in our atmosphere.
Celestron offers a model for 1-1/4" eyepieces (#94126A) and a model that attaches to the rear cell ahead of the
star diagonal and visual back (#94127A).
Micro Guide Eyepiece (#94171) - This multipurpose 12.5mm illuminated reticle can be used for guiding deep-
sky astrophotos, measuring position angles, angular separations, and more. The laser etched reticle provides
razor sharp lines and the variable brightness illuminator is completely cordless. The micro guide eyepiece
produces 100 power when used with the NexStar 5i at f/10.
Moon Filter (
#94119-A) - Celestron’s Moon Filter is an economical eyepiece filter for reducing the brightness of
the moon and improving contrast, so greater detail can be observed on the lunar surface. The clear aperture is
21mm and the transmission is about 18%.
Piggyback Mount, NexStar 8i (#93598) - A great accessory for all observers interested in deep-sky
astrophotography, particularly beginners. This mount allows you to attach your camera, with its lens, to either the