Celestron Ultima 8 Instruction Manual page 93

Eyepieces - Like telescopes, eyepieces come in a variety of designs. And, with the advent of different eyepieces,
Celestron also has a variety of designs each with its own advantages and disadvantages. For the 1-1 /4" barrel
diameter there are four different eyepiece designs available.
SMA - Super Modified Achromat. Good quality at an economical price. Models available are a 25mm, 12mm,
10mm and a 6mm.
Plossl - Plossl eyepieces have a 4-element lens system designed for low-to-high power observing. The Plossls
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: 6.3mm, 7.5mm, 10mm, 12.5mm, 17mm, 20mm, 26mm, 32mm, and
40mm.
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, 24mm, 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 use with or without the Reducer/Corrector.
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, 15mm. and a 8-24mm zoom.
In addition to the previously mentioned eyepieces, there is also a deluxe compact zoom ocular (#93306) that has a
variable focal length of 6.5 to 18mm. This provides 113 to 313 power on this telescope.
Fastar Lens Assembly – Allows you to convert your f/10 Fastar compatible telescope into a f/1.95 imaging system
capable of exposure times 25 times shorter than at f/10.
Flashlight, Red Astro Lite (93590) - A disposable red flashlight with a removable red filter. This can be used as a
red light for astronomy or as a regular flashlight. Just squeeze to operate. This includes a key chain for convenient
carrying.
Flashlight, Night Vision (93588) - This is a premium red LED flashlight for astronomy. Double LED's allow
brightness adjustment to suit your needs. This is bright enough for evening walks or dim enough for map reading
with dark adapted eyes. It comes with a lanyard to carry around your neck or on your wrist.
Flashlight (#93592) - The LED flashlight uses a red LED to allow reading star maps without ruining your night
vision. The LED flashlight is small, only 6 inches long, and weighs in at a mere 3 ounces.
Focus Motor (#94143) - For high power observations of planets and/or any objects, a focus motor is a necessity.
The focus motor allows for focusing an object without having to touch the telescope. This eliminates unwanted
vibrations.
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-l/4" eyepieces (#94126A) and a model that
attaches to the rear cell ahead of the star diagonal and visual back (#94127A)
Lens Shade (#94019) - The Dew Cap/Lens shade is a tube that fits on the front end of the telescope to reduce the
amount of dew that builds up on the corrector plate when observing at night. For daytime observing, this accessory
works as a lens shade to prevent stray light from falling on the corrector, a situation which reduces contrast. Day or
night, the Dew Cap/Lens Shade will enhance all your views.
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