Canon 93517, 93518, 93515 manual Filters, Yellow

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FILTERS

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue.

Celestron’s filters are made of high quality, solid plane parallel glass with excel- lent homogeneity. They’re anti-reflection coated to prevent glaring and ghosting. All eyepiece filters are threaded to fit Celestron’s, and most other manufacturer’s, 11/4" eyepieces, and offer a full 26mm clear aperture.

Celestron filters are mounted in black anodized aluminum cells with the Kodak Wratten Series Number individually engraved, and come with a plastic case for safe storage. The cells

of each filter are double-threaded, so they can be stacked (piggybacked) in various combinations. This allows you to create different color combinations and transmission charac- teristics, or to have the same color characteristic, but with a lower transmis-

sion. When stacking color filters, the effective transmission of the combination you create is equal to the product of the spectral transmission of each of the filters used.

The effectiveness of the filters depends on several factors, including: the aperture and focal length of the telescope, the magnification being used, and seeing conditions.

Following, you’ll find descriptions of all of Celestron’s eyepiece filters and what you can expect from them in different viewing situations. Some of these filters are available individually, and others are available in convenient four filter sets Celestron has put together to affordably expand your range of observing options.

You’ll find the information on these filters arranged in the following color cate- gories: Yellow, Orange, Red, Blue, Green and Violet. In each category, the informa- tion that applies to all of the filters within that color group is listed, then specific information for each filter is broken out into a separate category, where applicable. This way, you’ll know what to expect from each of Celestron’s color filters. At the same time, you’ll become familiar with the astounding variety of enhancements available through these simple accessories.

YELLOW

#12 Deep Yellow 74% T [#94118-03 & Series 2]

#15 Deep Yellow 67% T [Series 4]

Moon – Enhance lunar features. Jupiter – Penetrate and darken atmospheric currents containing low-hue blue tones. Enhance orange and red features of the belts and zones. Useful for studies of the polar regions. Mars – Reduce light from the blue and green areas which darken the maria, oases and canal markings, while lightening the orange-hued desert regions. Also sharpen the boundaries of yellow dust clouds. Neptune – Improve detail in larger telescopes (11" and larger apertures). Saturn – Penetrate and darken atmospheric currents containing low-hue blue tones. Enhance orange and red features of the belts and zones. Uranus – Improve detail in larger telescopes (11" and larger apertures). Venus – Reveal low-contrast surface features. Comets – Enhance definition in comet tails.

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Contents Accessories Table of Contents Binocular Neck Strap #71520 Accessories GeneralAC Adapters Binocular Tripod Adapter #93512-ADew Eliminator #94122 Car Battery AdaptersCollimation Tool #94183 FlashlightsLensPen #93575 Focuser Assembly #93670Accessory Package Kits Car Window Mount #93513Terrestrial .96 Erecting Eyepiece #93216 EyepiecesEconomy Eyepieces .96 and 11/4 Super Modified Achromatic SMA Eyepieces .96 and 11/4Plössl Eyepieces .96 and 11/4 Ultima Eyepieces 11/4LV Zoom Eyepiece 11/4- #3777 LV Eyepieces 11/4Focal Length Item # Cross Hair Eyepiece 11/4 #93304Eyeguard Set #93330 Ultima Spotting Scope EyepiecesModel 65mm Spotter 80mm Spotter Mount Type Barlow Lenses Diagonal #93519 DiagonalsDiagonals .96 and 11/4 Finderscopes Polar Axis Finderscope #94221 Quick Release Finder Bracket #51149-AStar Pointer #51630 Filters YellowOrange Green 11/4 Polarizing Filter Set #93608 Skylight Filter/Dust Seal #93621Solar Filters LPR Filters Deluxe Model Polaris Motor Drive System #93820-C Motor DrivesEconomy Models Declination MotorsGuiding Eyepieces Radial Guider #94176 Photo AccessoriesReducer/Corrector f/6.3 #94175 60mm Guidescope #22212 Hand Controller #28983Focus Motors Counterweights Adapters Rings 35mm16mm Adapter #93636 Deluxe Tele-Extender #93643Piggyback Mounts Peterson First Guides Astronomy #93728 Digital Setting Circles Advanced Astro MasterComputerized Circles / SKY Maps / Books Peterson First Guides Birds #93731Sky Maps #93722 PlanisphereCD-ROM #93700 Stereo Binocular Viewer Alt-Az Photo Tripod Mount #91533-A TripodsPhotographic/Video Tripod #93596 Slow Motion Controls for Photographic TripodsVibration Suppression Pads #93503 Lightweight Field Tripod #93591-AAdjustable 8 Tripod #93499 C5 Wedge #93654 Equatorial WedgesTelescope Equatorial Mount CG-3 #91503 Equatorial MountsCelestron ONE Year Limited Warranty Page Celestron International

93517, 93515, 93518 specifications

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