Celestron FirstScope 90AZ Instruction Manual page 13

Celestron firstscope 90az: instruction manual
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Flashlight, Night Vision - (#93588) - Celestron's premium model for astronomy, using two red LED's to preserve night
vision better than red filters or other devices. Brightness is adjustable. Operates on a single 9 volt battery (included).
Light Pollution Reduction (LPR) Filters (#94126A) - 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.
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%.
Peterson First Guides® - Astronomy (#93728)
A simplified field guide to the stars, the planets and the universe featuring full color maps showing the positions of the stars
throughout the year. This useful guide also includes beautiful constellation paintings, photographs, and clear, concise
descriptions of stars, the planets, the sun, the moon, comets, black holes, galaxies and more.
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.
Sky Maps (#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.
T-Adapter (#93625) - T-Adapter (with additional T-Ring) allows you to attach your SLR camera to
the rear cell of your Celestron telescope. This turns your telescope into a high power telephoto lens perfect for terrestrial
photography and short exposure lunar and filtered solar photography.
A full description of all Celestron accessories can be found in the Celestron Accessory Catalog (#93685) or web site
www.celestron.com
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