Celestron 93515 Manual

CELESTRON
Accessories
1998

2
Accessories — General
AC Adapters . . . . . . . . . . . . . . . . 3
Binocular Neck Strap . . . . . . . . . 3
Binocular Tripod Adapter . . . . . . 3
Cases . . . . . . . . . . . . . . . . . . . . . 3
Car Battery Adapters . . . . . . . . . . 4
Collimation Tool . . . . . . . . . . . . 4
Dew Eliminator . . . . . . . . . . . . . 4
Flashlights . . . . . . . . . . . . . . . . . . 4
Focuser Assembly . . . . . . . . . . . . 5
LensPen . . . . . . . . . . . . . . . . . . . 5
Accessory Package Kits . . . . . . . . 5
Car Window Mount . . . . . . . . . . 5
Eyepieces
Economy, Terrestrial, SMA . . . . . 6
Plössl, Ultima . . . . . . . . . . . . . . . 7
LV, Cross Hair, Deluxe Zoom . . . 8
Ultima Spotting Scope . . . . . . . . 9
Eyeguard Set . . . . . . . . . . . . . . . . 9
Barlow Lenses . . . . . . . . . . . .10
Diagonals . . . . . . . . . . . . . . . .11
Finderscopes . . . . . . . . . . . . . .12
Filters
Eyepiece . . . . . . . . . . . . . . . . . . .14
Polarizing, Skylight, Moon . . . . .17
Solar . . . . . . . . . . . . . . . . . . . . . .18
LPR . . . . . . . . . . . . . . . . . . . . . . .19
Motor Drives
Economy and Deluxe . . . . . . . . .20
Declination Motors . . . . . . . . . .20
Guiding Eyepieces &
Illuminators . . . . . . . . . . . . .21
Photo Accessories
Reducer/Corrector f/6.3 . . . . . . .22
Radial Guider . . . . . . . . . . . . . . .22
Hand Controller . . . . . . . . . . . . .23
Focus Motors . . . . . . . . . . . . . . .23
Guidescope . . . . . . . . . . . . . . . .23
Counterweights . . . . . . . . . . . . .24
Lens Shades . . . . . . . . . . . . . . . .24
T-Adapters and T-Rings . . . . . . .25
Tele-Extender . . . . . . . . . . . . . . .26
Piggyback Mounts . . . . . . . . . . .26
T-C 16mm Adapter . . . . . . . . . .26
Computerized Circles/
Sky Maps/Books
Advanced Astro Master . . . . . . .27
Beginning Books . . . . . . . . . . . .27
Planispheres . . . . . . . . . . . . . . . .28
CD-ROM . . . . . . . . . . . . . . . . . . .28
Sky Maps . . . . . . . . . . . . . . . . . .28
Stereo Binocular Viewer . . .29
Tripods and Accessories . . .30
Equatorial Wedges . . . . . . . .32
Equatorial Mounts . . . . . . . .33
Warranty . . . . . . . . . . . . . . . . .34
Please note:
Items requiring 220V-50HZ are
available through Celestron’s
international dealers only.
TABLE OF CONTENTS

3
AC Adapters
Allow DC (battery powered) telescopes to be convert-
ed for use with 120 volt AC power.
AC Adapter – C5+, Celestar 8, Ultima 91 /4& 11
[18772]
AC Adapter – Celestar 8 Deluxe, G-9, G-11 and G-
14 Mounts, Ultima®2000 [18770]
Binocular Neck Strap – #71520
This wide, black cloth strap, enhanced with the
Celestron logo, is designed to add greater
comfort and ease of use to your binocular
viewing. Fits most manufacturers’ binocular
models.
Binocular Tripod Adapter – #93512-A
This useful adapter attaches to the center hinge of most high
quality binoculars, allowing you to mount them to any tripod
equipped with a standard 1
/4" x 20 mounting bolt. A must for
vibration-free viewing, this adapter conveniently sets your
hands free for other tasks while observing.
Cases
If you own a C5 or C8 telescope,
it’s imperative that you
protect your investment.
Celestron offers a large
case suitable for the
task, which accommo-
dates almost any C5 or
C8 fork mounted
telescope. It’s construct-
ed of space age resin,
making it waterproof, unbreakable, airtight and
extremely durable. The case is lined with die cut
foam for custom fitting. It features large handles and is equipped with wheels,
for easy transportation. Weight is 17 lbs. Made in the USA.
A case is available for all C90 Spotting Scopes. It’s made of sturdy ABS plastic
and is die cut to fit the C90, a camera body and several accessories.
C5/C8 Case — I.D.— 29" x 173/4" x 91/4" [302070]
C90 Case — I.D. — 141/2" x 101/2" x 51/4" [302042]
302070
302042
ACCESSORIES — GENERAL

4
Car Battery Adapters
Allow you to link your telescope drive directly to
the cigarette lighter receptacle of your car, for a
quick and easy DC power source in one step.
Car Batter Adapter – C5+, Celestar 8, Ultima®
91 /4& 11 [18767]
Car Battery Adapter – Ultima®2000 [18769]
Collimation Tool – #94183
The optical performance of most Newtonian tele-
scopes can be optimized by collimating, or realign-
ing, the telescope’s optics, as needed. This procedure
is easily accomplished with Celestron’s Collimation
Tool, a handy accessory that comes with detailed
instructions.
Dew Eliminator – #94122
Celestron’s 12 volt Dew Eliminator means viewing sessions
can last longer. It blows warm air to keep your corrector
plate and any optional accessories dew-free. Just plug it into
your car’s cigarette lighter receptacle for trouble-free observ-
ing. 156 watts. Weight: 9 ounces.
Flashlights
Red Astro Lite – #93590
An economical, disposable 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 keychain.
LED Flashlight – #93592
A cost effective red LED flashlight for astronomy. It’s compact – only 6"
long and weighs just 2.5 ounces. Operates on two AA batteries (included).
Night Vision Flashlight – #93588
Celestron’s premium model for astrono-
my, 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). Made in the USA.
#18767
#18769
From Top:
#93588, #93592,
#93590

Focuser Assembly – #93670
Celestron offers this very smooth and economical
11
/4" rack and pinion focuser for Newtonian
telescopes. The focuser glides easily and provides 2"
of focus travel. An adapter is included to allow use
with .96" eyepieces as well as 11
/4" eyepieces.
LensPen™– #93575
A superb new tool in optical lens cleaning technol-
ogy. Perfect for cleaning binocular lenses, small
aperture spotting scopes
and telescopes, eyepieces,
and other optical items.
The LensPen™comes
with a handy retractable
dust removal brush and a
special non-liquid
cleaning element, designed to never dry out. Safe and very easy to use.
5
Car Window Mount – #93513
This durable, heavy-duty mount is carefully
designed to attach easily to your car window
and provide stable, vibration-free support for
binoculars, telephoto lenses and spotting scopes.
Accessory Package Kits
Accessory packages are offered especially for Dobsonian telescopes at savings over
individually priced items.
#92505 — contains a 5x24 finderscope, 10mm SMA eyepiece — 11
/4", moon filter
— 11
/4" and a CD-ROM “The Sky for Celestron”.
#92506 — contains a 6x30 finderscope, 10mm SMA eyepiece — 11
/4", moon filter
— 11
/4", LED flashlight and Celestron Sky Maps.
#92507 — contains a 9x50 finderscope, 7.5mm Plössl eyepiece — 11
/4", 17mm
Plössl eyepiece — 11
/4", moon filter — 11 /4", Night Vision flashlight and a CD-ROM
“The Sky for Celestron”.
#92505 #92507
#92506

6
Economy Eyepieces: .96" and 11 /
4"
Celestron offers these very economical
eyepieces to expand your viewing options.
They are all simple eyepiece designs —
Ramsden (SR & F) and Huygens (H & HM)
but perform quite well on f/8 or slower
telescopes. The optics are all glass and
they’re priced to make a complete range of
powers easily available.
Focal Item # Item # Eye Apparent
Length .96" 11
/4" Relief Field
4mm – SR 93201 93220 3mm 28°
6mm – F 93202 93221 3mm 28°
8mm – H 93203 93222 5mm 30°
12.5mm – H 93204 93223 8mm 30°
20mm – H 93205 93224 8mm 32°
25mm – HM 93206 93225 10mm 32°
Terrestrial .96" Erecting Eyepiece – #93216
This 1.5x eyepiece can be used on any telescope with
a .96" focuser to achieve an image correctly oriented
from top to bottom (rather than upside-down, as
most eyepieces display an image). Especially useful for
daytime terrestrial observing.
Super Modified Achromatic (SMA)
Eyepieces: .96" and 1
1
/
4"
The SMA design is an improved version of the
Kellner eyepiece. SMAs are very good, economi-
cal, general purpose eyepieces that deliver a wide
apparent field, good color correction and an
excellent image at the center of the field of view.
The eyepieces are fully coated for maximum
contrast. Celestron offers a range of SMA
eyepieces in both .96" and 11
/4" sizes.
Focal Length Item # .96" Item # 11
/4" Eye Relief Apparent Field
6mm 93105 93371 4mm 52°
10mm 93108 93372 6mm 52°
12mm 93109 93373 7mm 52°
17mm 93110 93374 13mm 52°
25mm 93101-A 93007-A 14mm 52°
11 /4" models
.96" models
EYEPIECES

7
Plössl Eyepieces: .96" and 1
1
/
4"
In a recent Sky and Telescope review, Celestron’s .96"
and 11
/4" Plössl eyepieces were rated as top ranking,
and found to outperform many similar, but more
expensive eyepieces. An exceptional value!
Celestron offers these premium eyepieces at
affordable prices, yet they’re among the best
designed and corrected eyepieces available. They’re
multicoated for enhanced contrast and all of the
11
/4" models are threaded to accept Celestron
colored eyepiece filters.
Focal Length Item # .96" Item # 11
/4" Eye Relief Apparent Field
6.3mm 93384 93338 5mm 52°
7.5mm 93380 93339 5mm 52°
10mm 93381 93340 7mm 52°
12.5mm 93385 93341 8mm 52°
17mm 93382 93342 13mm 52°
20mm 93343 15mm 52°
26mm 93383 93344 22mm 50°
32mm 93345 22mm 52°
40mm 93346 31mm 46°
Ultima®Eyepieces: 1
1
/
4"
These are Celestron’s top of the line eyepieces, utilizing
a hybrid design of five elements. They feature long eye
relief and a wide field, and each air-to-glass surface is
fully multicoated to enhance contrast levels. These
special eyepieces are computer designed to keep visual
aberrations to an absolute minimum. They virtually
eliminate the following aberrations: spherical, color,
field curvature, coma, astigmatism, distortion and spherical distortion of the
exit pupil. The inside surfaces and edges of all lenses are blackened, to keep out
reflected light. Outside surfaces are flat black, with rubber grips for secure
handling. Rubber eyecups are included both for comfortable use and to keep
out extraneous light. Threaded barrels accept Celestron thread-in filters. Lens
and barrel caps are included for safe storage.
Focal Length Item # Eye Relief Apparent Field
5mm 93350 4mm 50°
7.5mm 93351 5mm 51°
12.5mm 93352 9mm 51°
18mm 93353 13mm 51°
24mm 93354 18mm 51°
30mm 93349 21mm 50°
35mm 93355 25mm 49°
42mm 93356 32mm 36°
Recently, Sky &
Telescope reviewed
Celestron’s Ultima®
eyepieces and rated
them best in their
class, with greater
contrast and image
sharpness than the
competitive models
of other
manufacturers.

8
LV Eyepieces: 1
1
/
4"
These Vixen brand eyepieces (6 to 8 elements) are a
new breed, using the rare earth glass lanthanum in
one of their field lenses, for almost total freedom
from any visual aberrations. All focal lengths have a
comfortable 20mm of eye relief. Even when using
the 2.5mm LV eyepiece on a telescope, you’ll have
eye relief of 20mm! These eyepieces also feature soft rubber eyecups, rubber
coated bodies, and fully multicoated lenses for optical excellence.
Focal Length Item # Apparent Field
2.5mm 3714 45°
4mm 3715 45°
5mm 3716 45°
6mm 3717 45°
9mm 3718 50°
10mm 3719 50°
12mm 3865 50°
15mm 3756 50°
20mm 3757 50°
25mm 3758 50°
LV Zoom Eyepiece: 1
1
/
4"– #3777
This super premium zoom eyepiece has a focal length of
8mm to 24mm. It is the finest zoom eyepiece for low to
medium power observing. It’s an excellent zoom eye-
piece that performs superbly, with fully multicoated
surfaces. It offers an apparent field of 40° at 24mm and
60° at 8mm. Eye relief ranges from 15mm to 19mm.
Cross Hair Eyepiece: 1
1
/
4" – #93304
This eyepiece is of the Kellner design, with a focal length of
20mm. It’s ideal for centering alignment stars when using digital
setting circles or computerized telescopes. A useful all-around
eyepiece for many applications, including terrestrial observing. It
is fully coated and has an apparent field of 43°.
Deluxe Zoom Eyepiece: 1
1
/
4" – #93306
The Deluxe Zoom 6.5mm to 18mm 11 /4" eyepiece is a
recent design that has rapidly become the finest
zoom eyepiece ever offered for medium to high-
powered observing. This phenomenal eyepiece is
multicoated and extremely lightweight, weighing
just 5 ounces. It offers an apparent field of 38.5° at
18mm and 60.5° at 6.5mm. Eye relief is 11mm, even
at the highest power.

Ultima Spotting Scope Eyepieces
Extremely high quality eyepieces designed exclusively for the Ultima line of
spotting scopes.
Model 65mm Spotter 80mm Spotter Mount Type
#1828 20x 25x Bayonet
#1830 40x 50x Bayonet
#1838 16-48x Zoom 20-60x Zoom Thread
Eyeguard Set — #93330
A set of 10 rubber eyeguards that fit Celestron 11 /4" Economy, SMA and Plössl
(except 32 and 40mm) eyepieces as well as many eyepieces of other manufac-
turers. Allows more comfortable viewing by blocking out auxiliary light and
provides increased contrast for both astronomical and terrestrial viewing.
9
Clockwise: #1838, #1828, #1830

10
Barlow lenses offer an easy, economical way to
increase the magnification range of your eyepieces,
and Celestron carries an assortment of these highly
useful lenses. A Barlow lens doubles the magnifying
power of your eyepiece by doubling its effective focal
length. For example, an 18mm eyepiece used with a
2x Barlow lens would have the magnifying power of
a 9mm eyepiece. It’s like having two eyepieces in
one!
If you’re looking for an affordable way to achieve
high-power viewing of the moon and planets, double
stars and even close-up views of terrestrial subjects, a
Barlow lens is the answer.
Barlow lenses mount into either your telescope’s focuser or visual back.
The Economy models of .96" and 11
/4" are good choices when you want to
expand your power ranges at a very economical price.
Celestron’s premium quality .96" and 11 /4" achromatic Barlow lenses (#93502
and #93507) are compact and lightweight. Both are under three inches long,
with the 11
/4" lens weighing in at 4 ounces and the .96" lens a mere 2 ounces!
The clear aperture is 27mm on the 11
/4" model, and 21mm on the .96" unit.
The .96" Barlow is fully multicoated and the 11
/4" lens is multicoated.
The Ultima®Series Barlow (2x – 11
/4") is an air-spaced, three element apochro-
matic design with a 27mm clear aperture. This lens features a very high
quality, fully multicoated design. Amazingly compact and lightweight, it’s
just 5 ounces and 2.75" in length.
2x Barlow Lens – Economy – .96" [93211]
2x Barlow Lens – Economy – 11 /4" [93213]
2x Barlow Lens – Deluxe – .96" [93502]
2x Barlow Lens – Deluxe – 11 /4" [93507]
2x Barlow Lens – Ultima®Series - 11 /4"
[93506]
Top: #93506, 93502, #93507
Bottom: #93213, #93211
Eyepiece
Focuser or
Visual Back
Barlow Lens
Option:
Diagonal
BARLOW LENSES

11
Diagonals: .96" and 1
1
/
4"
Celestron’s Erect Image Diagonals are an Amici
prism design. This design allows you to look into
the telescope at a 45° angle, at images that are
oriented properly, meaning the image is upright
and correct from left to right. Use of Celestron’s .96"
to 11
/4" 45° Erect Image Diagonal on a telescope
equipped with .96" eyepieces means greater versatil-
ity. This diagonal will allow you to use 11
/4" eye-
pieces, to obtain a larger field of view and better eye
relief. A 90° 11
/4" Erect Image Diagonal is available
for those who prefer that angle.
A Star Diagonal lets you view objects that are at a
90° angle from the direction the telescope is
pointing, thereby allowing comfortable viewing
when the telescope is pointed at, or near, the zenith
(i.e. directly overhead). The resulting image is right
side up, but will be reversed from left to right.
The economy Hybrid Mirror Diagonal (90°) provides
a cost effective way to upgrade telescopes supplied
with .96" eyepieces, to higher quality 11
/4" eyepieces.
Erect Image Diagonal 45° – .96" [94111-A]
Erect Image Diagonal 45° – 11 /4" [94112-A]
Erect Image Diagonal 45° – .96" to 11 /4" [94113-A ]
Erect Image Diagonal 90° – 11 /4" [94108]
Star Diagonal – .96" [93630]
Star Diagonal – 11 /4" [94115-A ]
Hybrid Mirror Diagonal – .96" to 11 /4"
[94106]
2" Diagonal – #93519
Celestron offers a standard 2" 90°
Mirror Diagonal to thread on Schmidt-
Cassegrain telescopes. This improved
version of our 2" Diagonal includes an
adapter to accept 11
/4" eyepieces. It has
a multicoated mirror and smooth
mechanics that are precision manufac-
tured for reliability.
Clockwise: #94115-A,
#93630, #94106
Clockwise: #94112-A,
#94113-A, #94111-A, #94108
DIAGONALS

12
Finderscopes are secondary scopes, used to help
locate objects in the main telescope. The larger
the finderscope, the more you’ll see, to an upper
limit of 50mm. Units larger than 50mm have
too narrow a field of view to be useful.
Finderscopes mount onto the main telescope
tube and are an invaluable tool in locating
objects for viewing.
5x24 Finderscope – #93775
An economical finderscope for Celestron’s Star Hopper™Dobsonian telescopes.
Includes mounting bracket.
6x30 Finderscope – #93779
This achromatic finderscope has an extra wide 7° field of view. Its aluminum
body is painted a glossy black color, and the mounting bracket is the same as
that used on many C8 telescopes.
6x30 LER (Long Eye Relief) Finderscope – #93777
This model has all the features of the 6x30 Finderscope (model #93779) and
comes with a mounting bracket. It’s a particularly good choice for Celestron’s
Star Hopper™Dobsonian telescopes. Can also be used to upgrade Firstscope 60,
70 and 114 telescopes, which come with a standard 5x24 finderscope.
Finderscope also sold separately (model #51602-B).
9x50 Finderscope – #93783-8
A high quality, economical 9x50 finderscope with fully coated lenses and a
5.8° field of view. It comes with a mounting bracket for C8 type telescopes.
Finderscope also sold separately (model #51611).
7x50 Polaris Finderscope – #93785-8P
The 7x50 Polaris Finderscope comes
with a mounting bracket (for C8
telescopes) and hardware, setting plate,
and the Polaris etched reticle and
Pulstar Illuminator for quick, accurate
polar alignment. It has a 5° field of
view and eye relief of 17.5mm.
Finderscope also sold separately
(model #51614).
Clockwise: #93777, #93775,
#93779, #93783-8
FINDERSCOPES

13
Quick Release Finder Bracket –
#51149-A
A unique bracket for 50mm finderscopes, it’s
designed for C8, C91
/4and C11 telescopes. No
tools are required, and once it’s aligned, you
can take it off and put it on without losing
alignment. Bracket includes necessary mount-
ing hardware. The additional weight of this
accessory may require that you use additional
optional counterweights for your telescope.
Star Pointer – #51630
A 1x, or unit power finderscope designed so you can point the telescope while
scanning the sky with both eyes. Finding
objects couldn’t be easier! A mirror lens
projects the image of a LED illuminated
pinpoint into the line of sight, providing you
with a red dot of light to center on the object
you want to view. Something like having a
laser pointer that reaches into the sky, it
greatly simplifies finding objects. The bright-
ness level is adjustable, and the Star Pointer
can be used during daytime observing as well.
It’s also a handy guide when using binoculars.
Attaches to any telescope easily.
Extra bases are available (#51631) to make it easy to move the Star Pointer for
use on different telescopes.
Polar Axis Finderscope – #94221
This useful accessory speeds accurate polar
alignment by providing a means of visually
aligning your German equatorial mount with
Polaris and true north. As a result, you can
spend more time observing and less time
setting up. The finderscope has an easy to use
cross hair reticle. For CG-4 and CG-5 mounts.

14
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.
FILTERS

15
#8 Yellow 83% T [Series 4]
All observing information for this filter is the same as that given for the #12 and #15 Deep Yellow
filters, with the exception of the following:
Mars – Improves the Martian maria by reducing scattered light from blue areas, while allowing
passage of more green light for studying yellow dust clouds. Comets – Brings out highlights in
yellowish dust tails and enhances appearance of comet heads.
ORANGE
#21 Orange 46% T [#94118-05 & Series 1]
Moon – Greatly enhances lunar features. Jupiter – Improves appearance and detail revealed in
structure of Jovian belts. Enhances viewing of festoons and polar regions. Mars – Reduces light
from the blue and green areas which darken the maria, oases and canal markings, while lightening
the orange-hued desert regions. Also sharpens the boundaries of yellow dust clouds. Mercury –
Reduces the brightness of blue sky during daylight observing, to reveal surface features. Saturn –
Improves structure of the Saturnian bands and highlights blue polar regions. Venus – Use during
daylight observing to reduce brightness of blue sky. Comets –Enhances definition of comet dust
tails and heads in larger telescopes (11" and greater aperture). Solar – When using a Celestron Mylar
Solar Filter, adding this orange filter will give true color rendition.
RED
#25 Red 14% T [#94118-07 & Series 2]
Moon – Improves lunar features. Jupiter – Useful for studying bluer
clouds. Mars – Ideal for observation of the polar ice caps and features
on the Martian surface. Sharpens the boundaries of yellow dust
clouds. Mercury – Improves observation at twilight, when the planet
is near the horizon. During daylight, it reduces the brightness of the
blue sky to enhance surface features. Saturn – Useful for studying
bluer clouds. Venus – Use during daylight observing to reduce
brightness of blue sky. Occasionally deformations of the terminator are visible.
#23A Light Red 25% T [Series 3]
All observing information for this filter is the same as that given for the #25 filter, with the exception
of the following:
Mars – Reduces light from blue and green areas which darkens the maria, oases and canal markings,
while lightening the orange-hued desert regions. Sharpens the boundaries of yellow dust clouds.
Comets – Improves definition of comet dust tails.
BLUE
#80A Light Blue 30% T [#94118-12 & Series 1]
#82A Pale Blue 73% T [Series 4]
#38A Blue 17% T [Series 3]
Moon – Enhance lunar detail. Jupiter – Enhance the boundaries between the reddish belts and
adjacent bright zones. Useful for viewing the Great Red Spot. Mars – Very useful during the violet
clearing. Helpful in studying surface features and polar caps. Mercury – Improve observation of dusky
surface markings at twilight, when the planet is near the horizon. Saturn – Enhance low-contrast
features between the belts and zones. Venus – Useful for increased contrast of dark shadings in upper
Venusian clouds. Comets – Bring out the best definition in comet gas tails.

16
GREEN
#56 Light Green 53% T [Series 2]
Moon– Enhances lunar features. Jupiter – Increases visibility of the Great Red Spot. Useful for
observing the low-contrast hues of blue and red that exist in the Jovian atmosphere. Mars – Excellent
for increased contrast of Martian polar caps, low clouds and yellowish dust storms. Venus – Useful for
Venusian cloud pattern studies. Reduces brightness of blue sky during daylight observing.
#58 Green 24% T [#94118-11 & Series 3]
All observing information for this filter is the same as that given for the #56 Green filter, with the
exception of the following:
Saturn – Enhances white features in the Saturnian atmosphere.
Comets – Useful for observing brighter comets.
VIOLET
#47 Violet 3% T [Series 4]
Mars – Useful for detecting high clouds and haze over the
Martian polar caps. Very useful during the violet clearing.
Mercury – Helpful in detecting faint features. Saturn – Good for
ring structure studies. Venus – Increases contrast of dark shading
in upper Venusian clouds. Comets – Useful for observing
brighter comets.
96ND FILTERS
#96ND 50% T – Density 0.3 [Series 3]
#96ND 25% T – Density 0.6 [#94118-15 & Series 2]
#96ND 13% T – Density 0.9 [#94118-16 & Series 1]
Moon – Excellent for reducing irradiation, glare and subject brightness. Colors are unaltered, as light
is transmitted uniformly over the entire spectrum. Each model performs somewhat differently,
depending on the brightness of the moon. Planets – Stacking in combination with color filters lowers
transmission, but retains true color balance for specific applications. Reduces glare on brighter planets
and minimizes irradiation. Binary Stars – Helpful in splitting binary stars, because it reduces glare and
diffraction effects around the brighter star of the binary pair.
POLARIZING
[#94118-17 & Series 1]
Reduces reflected polarized light in the earth’s atmosphere.
Moon & Planets – Invaluable in reducing irradiation and glare. Binary Stars – Helpful in splitting
binary stars, because it reduces glare and diffraction effects around the brighter star of the binary pair.
FILTER SETS
Celestron offers four convenient filter sets, which contain four different filters per set. Not only are
these highly useful filter combinations, but they also offer an economical way to add versatility to
your filter collection. Descriptions of all filters within these sets are given above.
[Series 1 – #94118-S1]
Orange, Light Blue, ND13%T, Polarizing (#s 21, 80A, 96ND-13, Polarizing)
[Series 2 – #94118-S2]
Deep Yellow, Red, Light Green, ND25% T (#s 12, 25, 56, 96ND-25)
[Series 3 – #94118-S3]
Light Red, Blue, Green, ND50% T (#s 23A, 38A, 58, 96ND-50)
[Series 4 – #94118-S4]
Yellow, Deep Yellow, Violet, Pale Blue (#s 8, 15, 47, 82A)

17
11 /
4" Polarizing Filter Set: – #93608
Ambient daylight is normally comprised of multiple
wavelengths of light, vibrating in multiple planes. The
Eyepiece Polarizing Filter Set transmits only light moving
along a specific plane, thereby increasing the contrast
between surfaces with different planar transmissions.
Generally, the polarization effect makes blue skies a
deeper blue, eliminates surface reflections and helps
reduce atmospheric haze.
The Polarizing Filter Set is intended for visual use. It’s particularly useful for reducing
glare while observing the moon, double stars, the planets and terrestrial subjects – all
without affecting the color of the object being observed.
The Filter Set is comprised of two filters that thread into either the eyepiece or the
filter adapter, which comes with the set. When one filter is used alone, you get 30%
light transmission. When both filters are used together, you can vary the degree of
transmission. By causing the amount of transmitted light to vary, the filters become,
in effect, a continuously variable neutral density filter. At
maximum density, the Polarizing Filter Set transmits only 5%
of entering light.
Skylight Filter/Dust Seal – #93621
If you were to use only one filter, Celestron’s Skylight
Filter/Dust Seal would be your most versatile choice. This
general purpose, Wratten #1A filter improves color saturation
and balance, increases visual and photographic contrast, helps
to decrease glare in lunar and planetary observing, and penetrates atmospheric haze.
It’s also an inexpensive way to protect your investment in quality optics. This filter
threads onto the rear cell of your Celestron C5, C8, C91 /4, C11 or C14 telescope to
serve as an effective dust seal. By leaving the Skylight Filter/Dust Seal on when
removing or attaching other visual accessories, you prevent dust and other atmospher-
ic contaminants from entering the rear of your telescope. Needless to say, it’s much
easier to clean a dusty filter than a dusty primary mirror, secondary mirror and
corrector plate.
The Skylight Filter/Dust Seal must be threaded onto the rear cell of the instrument
before any other accessory is installed. The female end attaches to the rear cell of the
C5, C8 and C91 /4telescopes and the reducer plate of the C11 and C14 telescopes. All
additional accessories mount onto the exterior/male threads.
Moon Filters
Celestron’s Moon Filters are economical eyepiece filters 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 for the 11 /4" filter and
10mm for the .96" filter. Transmission is about 18%.
11 /4" Moon Filter [94119-A]
.96" Moon Filter (for Economy and SMA Series
eyepieces) [94119-B]

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Solar Filters
Celestron’s Solar Skreen®solar filters
transmit .001% of visible light, allowing
direct observation of the sun. You can see
sunspots and the mottled areas known as
granules with these filters. In addition to
reducing the intensity of the sun’s visible
light, they also block 99.999% of invisible
infrared light, so you can observe the sun
in complete safety and comfort.
The material used to make these filters is a
strong, precision engineered, aluminized
polyester film known as Mylar. Each filter
consists of two sheets of Mylar. A layer of
aluminum is vacuum-deposited on each of these pieces of Mylar. The two
coated surfaces are then placed against each other to protect them from
scratching and other abuses. The material is very thin, about .0003", which is
about one-tenth the thickness of a human hair. Mylar offers superior perfor-
mance to thicker filters and is less expensive than conventional glass filters. In
addition, glass filters are subject to breakage whereas the mylar filters are more
durable.
Mylar is a very flexible substance by nature. In fact, when the Solar Skreen is
mounted in the filter cell, it will be quite wrinkled. Don’t be fooled by appear-
ance, because the best resolution is obtained when the material is slightly
relaxed or wrinkled.
The color of the solar image will look different than it does with other filters.
The aluminum coating creates a solar image that’s a cool, pale blue color. A
more true color image can be obtained with the appropriate correction filter:
either #21 Orange or #23A Light Red.
Solar Filter – For use with F60s & F60EQs [94131]
Solar Filter – For use with F70s, F80s and C80s [94135]
Solar Filter – For use with F114s and C114s [94134]
Solar Filter – For use with C8s [94162]
Clockwise: #94162,
#94134, #94131, #94135

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LPR Filters
Light Pollution Reduction (LPR) Filters are
designed to selectively reduce the transmission
of certain wavelengths of light, specifically
those produced by artificial light. This
includes mercury, and both high and low
pressure sodium vapor lights. In addition, they
block unwanted natural light caused by
neutral oxygen emission in our atmosphere
(i.e. sky glow). As a result, Celestron LPR
Filters darken the background sky, making
deep-sky observation and photography of
nebulae, star clusters and galaxies possible
from urban areas. LPR Filters are not used for
lunar, planetary or terrestrial photography.
While blocking unwanted light, Celestron LPR Filters permit the transmis-
sion of more desirable wave-
lengths. The wavelengths
included are hydrogen alpha,
hydrogen beta, doubly ionized
oxygen and singly ionized
nitrogen. This will improve your
viewing of emission nebulae,
both from urban and rural
settings. Some examples of
objects that will show improved
contrast are: the Orion Nebula,
the Rosette Nebula, the North
American Nebula, the Veil
Nebula and the Helix Nebula.
The latest generation of
Celestron LPR Filters is made of
high quality, flat, polished
optical glass. These units are not
laminated! With over 40 layers
of coating, these filters are state-
of-the-art. They’re also protected with a broadband anti-reflection coating to
prevent ghosting and to improve contrast. They provide superior perfor-
mance and contrast over competitive models.
LPR Filter – for 11 /4" eyepieces [#94126A]
LPR Filter – for rear cell of Celestron’s C5, C8 or C91 /4[#94127A]
(Fits on the reducer plate of C11 and C14 telescopes.)
#94127A
#94126A

20
To allow automatic tracking of celestial objects,
Celestron offers several motor drives. All models
include a hand controller, which makes observ-
ing more fun as it makes centering objects
much easier. In addition, the hand controller
can be used as a drive corrector for long expo-
sure celestial photography.
Economy Models
These models are single axis (R.A.), DC motor
drives. They are powered by four D-cell batteries
(not included). 2x and 4x sidereal speeds are
available through the included hand controller.
Model #93515 — MDCG-3 (for Firstscope 80s and 114s)
Model #93517 — MDCG-4 (for CG-4 mounts)
Model #93518 — MDCG-5 (for CG-5 mounts)
Deluxe Model — Polaris Motor Drive System – #93820-C
This dual axis motor drive, with drive corrector capabilities, is designed for
Celestron’s CG-5 and GP mounts. It precisely controls the telescope’s
tracking speed during long, timed exposures of celestial objects, producing
the best possible image sharpness. Precision drive correctors are a must for
those with a serious interest in astrophotography or
CCD imaging. Three speeds are available — (1x)
sidereal, 1.3x for guiding and 6x for centering.
This precision, state-of-the-art DC motor drive
operates on a 9 volt battery (not included). The hand
controller module is very compact and fits easily in
the palm of your hand. Motors for both axes are
included, along with brackets, clutches and hard-
ware. Made in the USA.
Declination Motors
Celestron’s Declination Motor attaches to your
telescope’s manual declination control to offer
smooth, vibration-free control in declination.
Run by the telescope’s power supply, it plugs
directly into the drive base and is controlled by
two buttons, for north and south declination
movement. Highly useful for observing, and a
must for astrophotography.
DEC Motor for C5+[93547]
DEC Motor for Celestar 8, Ultima 91 /4& 11
[93549]
#93549
#93547
#93517
MOTOR DRIVES