William Optics ZenithStar 80 User manual

ZENITHSTAR 80
INSTRUCTION MANUAL
www.william-optics.com
William Optics Corp.
WILLIAM OPTICS USA
Crafting the Earth's Finest Astronmical Instruments
CONTACT US
WILLIAM OPTICS USA
Tel: [phone]
Fax: [phone]
web: www.william-optics.com
e-mail: [email protected]
Crafting the Earth's Finest Astronmical Instruments

CONTENTS
01
02
03
04
05
06
07
08
09
10
10
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12-14
15-16
Thank you for choosing a William Optics ZENITHSTAR 80 high-
quality short tube refractor.
This simple step-by-step instruction manual is designed to provide
Zenithstar owners with a better understanding of how to operate
their new telescope by providing precise, updated information.
These instructions will also guide you through how to properly
maintain the Zenithstar, and how to operate it at its maximum
capabilities.
Please carefully familiarize yourself with your telescope's parts
and functions before operating it for the first time.
Crafting the Earth's Finest Astronmical Instruments
It could easily cause instant blindness or serious damage to your
eyes. To view the sun, use only appropriately designed solar filters
that will reject 99.96% of the sun light and heat. Educate your family
on how to use this telescope properly during day and night time
observations. For further information please contact your local dealer.
DO NOT USE THIS TELESCOPE UNDER ANY
CIRCUMSTANCES TO DIRECTLY VIEW THE SUN.
WARNING!
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Getting to know your telescope
ZenithStar 80 Specifications
ZenithStar 80 Acessories Chart
Connection Instructions ( 2 inches Diagonal Mirror )
Connection Instructions ( 2 inches 45 Erecting Prism )
Connection Instructions ( Erecting Finderscope )
Connection Instructions (Aligning Finderscope )
Usage
Storage and Cleaning
Caution and Safety
Standard Equipment
Accessories
Recommended for This Scope
WO Policies & Warranty

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Retractable dew shield
Dew shield cover
Connection point
for tripod
L-bracket
Lock screw for
the focuser tube
Focuser knob
2" to 1.25" adapter
o
360 rotatable focuser knob
Getting to know your telescope
1.25" adapter lock screw
2" clamping screw
Main tube
Extend
ZenithStar 80 Refractor Specifications
P01
Limiting Magnitude
Aperture
Focal Ratio
Focal Length
Objective Type
Resolving Power
Lens Shade
Focuser
1.25" Adapter
Field Stops
Tube Diameter
Tube Weight
Tube Length
Case
Case Dimensions
L-Type Mount
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80mm
F/6
480mm
Doublet Element Design
Fully Multi-Coated
1.45"
11.3
Retractable
360 Rotating
Camera-Angle Adjuster
Focuser Travel Length 3.15" (80mm)
1.25" Adapter Included
Brass Compression Rings
15 Baffles
90mm
5.3 lbs. (2.4 kg)
14"(356 mm) Fully Retracted
Soft Carrying Case
Aluminum Case (optional)
19" x 11" x 6.3" (48x26x16 cm)
L Bracket Based

DCL-4337 Digital Video
DCL-52
ZenithStar 80 Accessories Chart Connection Instructions
( 2" Diagonal Mirror )
90mm Mounting Rings
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Finder Bracket
Tripod
6x30 Erecting Finderscope
Flattener / Reducer
Cooling CCD Camera
SLR / DSLR Camera
2" Photo Adapter
Camera Adapter
2" Diagonal Mirror &
2" Dielectric Diagonal 2" Eyepiece
2" 45 degrees
Erecting Prism
Digital Camera
(Canon,CASIO,
SONY,OLYMPUS)
DCL-28
1.25" Violet
Reducer Filter(VR)
NIKON
Digital Camera
1.25" Eyepiece
Stylish Carrying Bag
(Water Resistant)
Equatorial Mount
Above diagram is only for future connectivity purposes.
Please contact our Authorized Dealers for accessories purchase.
Step-1
Using the supplied L-Bracket, attach the
telescope to the tripod threaded with a standard
photographic 1/4-20 connection knob. Ensure
that the knob is tight or locked down before
proceeding.
After the telescope is firmly connected to the
tripod, extend the dew shield.
Loosen lock screw for release. Remove 2" to 1.25" adapter.
Tighten lock screw.
Tighten lock screw.
Insert eyepiece for
visual observation.
Step-2
Step-3
Step-4
Crafting the Earth's Finest Astronmical Instruments
1.25" 45
Erecting Prism

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Step-1
Extract the black plastic screw
and place the finder bracket on
ZenithStar focuser and attach with
lock screw.
Step-1
Using the supplied L-Bracket, attach the
telescope to the tripod threaded with a
standard photographic connection knob.
Ensure that the knob is tight or locked down
before proceeding.
After the telescope is firmly connected to the
tripod, extend the dew shield.
Loosen lock screw for release. Remove 2" to 1.25" adapter.
Tighten lock screw.
Tighten lock screw.
Insert eyepiece for
visual observation.
Step-2
Step-3
Step-4
Finder Bracket Lock Screw
Finder Bracket
Step-2
Insert finderscope into
finder bracket.
Step-3
Insert illuminator.
into finderscope.
Unscrew the knob of illuminator.
Remove the knob from finderscope.
Crafting the Earth's Finest Astronmical Instruments
Step-3
Tighten the knob
on finderscope. Adjust the alignment screws.
connection point
for finderscope bracket
Connection Instructions
( 2" Erecting Prism )
Connection Instructions
( Finderscope )

View Field of Telescope with WO Erecting Finderscope
(Note: The image will be reversed left to right if a standard star Diagonal is used)
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P08
Step-1
Find a distant object in the
telescope with a low power
eyepiece.
Crafting the Earth's Finest Astronmical Instruments
Align the finderscope pointing at the same object as the telescope.
Step-2
Align the finderscope by
pointing at the same object,
then loosen or tighten the
alignment screws.
Step-3
Use a high power eyepiece
and repeat this procedure.
View Field of Telescope.
(with WO Erecting Prism)
View Field of Finderscope.
(with WO Erecting Illuminated
Finderscope)
Alignment Screws.
Usage
The Zenithstar 80 is designed to work with both 1 1/4 inch and 2 inch diameter eyepieces
in various focal lengths, for both daytime and nighttime viewing. Because the Zenithstar
80 is well suited to viewing nebulae, clusters, large galaxies and comets, we recommend
the use of high quality wide angle eyepieces. The WO SWAN and UWAN series eyepieces
are available in a variety of focal lengths. Viewing the moon and planets is also
impressive at magnifications of 120X when seeing conditions permit.
To calculate the magnification of your telescope and eyepiece combination, divide the
telescope focal length in mm by the eyepiece focal length in mm. For example, a 4mm
eyepiece in Zenithstar 80 will display an image of 120X. (480mm / 4mm = 120). The
suggested maximum magnification for the Zenithstar 80 is 120X.
Keep in mind that the atmosphere plays an important role in seeing conditions, and only
the best seeing conditions will support high power viewing. Additional power under
less than ideal seeing conditions will not result in an increase in viewable details, and
lower powered eyepieces should there be used under those conditions. It's easiest to
locate objects using low power eyepieces (20X magnification) and then zoom in by
switching to higher powered eyepieces. The largest field of view will be seen using a
12X low power-wide field of view eyepiece.
A stable tripod or mount is recommended for optimal viewing. This includes high quality
photography tripods, and German Equatorial mounts, which are designed for astronomical
use and include precise tracking of celestial objects. Optional accessories from WO
include mounting rings and plates, super high quality 2" Quartz star diagonals, and 2"
Erecting Prisms, all of which provide for superior viewing and high quality images.
The Zenithstar telescope has not been specifically designed for astrophotography;
however it is able to produce very good results when used with the proper equipment.
Please see our website for examples of photos taken with these telescopes. The
Accessories Chart on page 13 provides additional details on photographic accessories
for various CCD, digital and film cameras.
Never aim your telescope or finderscope at the Sun without proper Solar filters installed
on the front of the telescope. Doing so for even a moment may permanently damage
your vision. Proper Solar filters consist of a filters made by reputable manufacturers,
designed to fit tightly over the front of the dew shield. Solar eyepiece filters are not
considered safe, and should not be used. With proper front mounted Solar filters, the
telescope will not be harmed by viewing the Sun. Contact your Authorized WO Dealer
for further information on the brands, sizes, and prices of proper solar filters.
Connection Instructions
( Aligning Finderscope )

Standard Equipment
1. Stylish soft backpack style carrying case with custom fitted foam
interior, designed to be water resistant and carry-on size.
2. L-bracket with standard 1/4-20 photographic threads
3. Gold plated dew shield cover
4. 2" to 1.25" adapter
Storage and Cleaning
P09
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P10
Crafting the Earth's Finest Astronmical Instruments
We recommend storing all equipment in an air tight container with desiccate packages
to remove unwanted humidity from the air. Never leave the telescope in a humid
environment, and avoid leaving the scope in a hot heated environment. If not properly
stored, it is possible for the scope to develop mildew growth or other preventable
conditions. Be careful after a night of observing when conditions might leave dew on
the lens, and allow the scope to air dry in a room temperature environment before storing
the telescope.
If the front lens surface becomes dusty, smeared, shows fingerprints, or any other
surface build up, the following steps can be taken to clean the lens. First, gently blow
away any surface dust or particles with a clean air blower (canned or compressed air is
not recommended). Second, use a photographic quality optical cleaning solution and
cloths to gently wipe the surface clean. A clean cloth should be used every time that
cleaning is needed. With proper care, and protection, cleaning should rarely be needed.
The Zenithstar has a beautiful high gloss anodized finish that can be easily smudged
with fingerprints; however this will not harm the finish. A slightly dampened clean soft
cloth with plain water should be enough to clean the surface. Please avoid any harsh
chemical cleaners or organic solvents like benzene, alcohol, etc, as these may ruin the
finish.
Caution! Never directly view the Sun with your telescope!
Do not aim your telescope at the Sun without a front mounted high
quality professionally manufactured solar filter. Viewing the Sun without
the proper protection may result in permanent severe damage to your
eyes, and even cause blindness. Contact your Authorized WO Dealer
if you are interested in purchasing a compatible and proper solar filter.
Always place the telescope on a flat surface, to prevent it from falling
and injuring yourself or others.
Never use the telescope in the rain or in conditions where it may get
wet. The telescope is not designed to be waterproof. If the telescope
accidentally gets caught in the rain, immediately wipe off all water
using a clean dry soft cloth. If the telescope gets totally soaked in
water, immediately contact your Authorized WO Dealer for service
instructions.
Do not disassemble or attempt to repair your telescope without a
written authorization from William Optics Corp., as this violates the
warranty terms under the limited product warranty, and negates any
guarantee.
Caution for Safety
The focuser's tension can be adjusted using a 2.5mm allen wrench if needed.
The Focuser Lock Thumb Screw is used to tighten down the focuser's travel
while in use to prevent the focuser from accidentally moving. This is most
likely when the telescope is pointed upwards and the additional weight of
large eyepieces or photography equipment may make the focuser move on
its own.
Please consult with your consult with your Authorized WO Dealer or WO
directly if you have any questions before adjusting the focuser.
2.5mm
Allen screw driver
Focuser Tension
Adjustment Screw

1.25"45
with 2" Barrel 1.25" 45
Perfect both for astronomical and terrestrial observations.
Revolutionary and sophisticated design, extra-smooth feel.
45 Erecting Prisms
Recommended For This Scope
P11
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Crafting the Earth's Finest Astronmical Instruments
Optional Equipment
A sturdy tripod for astronomical or spotting scope usage, or a telescope tripod and
mount (Equatorial or Alt-Az)
A mirror diagonal or erecting prism (The 2" WO Dielectric model is strongly
recommended for high quality astronomical viewing. A top quality Dielectric Quartz
model is now also available from WO)
At least one or two high quality eyepieces (9mm to 40mm wide-field recommended)
depending on the application.
For astrophotography, a photo adapter plus a T-Mount connection are necessary.
William Optics offers a 0.8X field Reducer / Flattener with CCD camera adapter.
Please refer to our accessories chart on page 3.
In order to operate your Zenithstar 80 you will need the following
minimum equipment:
Erecting, illuminated reticle finderscopes with bracket ( 6x30 and 7x50 models
available).
WO 2" and 1.25" Erecting prisms.
Super wide angle Eyepieces, 1.25" or 2" versions.
DCL 28, 4337 series.
(Digital Camera adapter Lens for Digital Cameras and Digital Video).
Digiscoping adapter: universal adapter for any type of digital camera.
WO 1.25" VR-1 filter improves seeing on bright objects like the Moon.
(Violet-Reducer).
WO 80 mm mounting rings, saddle plate, dovetail plate combo for equatorial
mounting.
WO 2" Extension Tube.
WO 2" Photographic Adapter
Also available from WO:
Diagonal Mirrors
Erecting prisms
99% reflectivity with 1/10 lambda
high-precision mirror surface, with
elegant exterior design, with 1.25"
adapter.
2" Dielectric
Diagonal Mirror
2" 45
High-quality dielectric coating (99% reflectivity),
precision-polished quartz flat in our much-admired,
patented mechanics.
Our 2" Diagonals are what you need for your best
observing sessions. Only from William Optics.
2" Quartz
Dielectric Diagonal

Super Wide Angle (82 ).
9 mm, 15 mm, 20 mm focal lengths.
5 elements in 4 groups, fully multi coated.
Parfocal.
P13
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P14
Crafting the Earth's Finest Astronmical Instruments
Mounting Rings
Reducer / Flattener
W.O. Eyepieces
Digital Camera adapter Lenses
1.25" UWAN Eyepieces
2" SWAN Eyepieces
To connect digital cameras and video
cameras with 43&37mm threads.
Perfect for super-micro shots.
DCL-4337
This innovative digital adapter lens is
designed for large-lens digital camera and
digital video cams users' needs.
It can be connected to any 2" diagonal or
erecting prism.
DCL-52
Felt lined, so you won't scratch your beautiful new tube.
Fully and precisely machined, solid and easy to use.
700g per pair.
90mm Mounting internal diameter
25mm 33mm, 40mm focal lengths, FMC.
Generous eye-relief.
Super Wide Angle, perfect for richfield
observations.
This very elegant 2" reducer/field flattener comes with a CCD camera adapter.
In addition to reducing the focal length by a factor of 0.8 for fast photography,
it works as a flattener of the field curvature for sharp and pinpoint stars in your
pictures. It is especially recommended to imagers using a CCD camera.
0.8x Reducer/Flattener with CCD camera adapter

William Optics is the manufacturer of the products sold on WOnline and through its
Authorized Dealers sales network. This means that each original item is covered by the WO
warranty. For a period of two years from the date of original retail purchase, WO will repair
or replace a defective product provided it is returned to WO freight prepaid, with proof of
purchase. Please contact WO to solve any warranty claim.
If the product has been misused, mishandled or if repairs have been attempted or performed
without explicit consent from WO, the warranty will be deemed void. Normal wear-and-tear
is not covered by this warranty. If the claim is denied because it is deemed to be a non-
manufacturing defect, the customer will be notified of the reasons of denial.
This warranty is the manufacturer's warranty; additional warranties may apply but are
beyond William Optics Corp.'s responsibility.
WO reserves the right to verify all warranty claims for defective products. WO furthermore
reserves the right to change these terms and conditions and product specifications or to
discontinue products without previous notice. This does not affect your warranty rights.
Beyond the warranty period it is the customer's responsibility to deal directly with WO in
order to agree upon any repairs or replacements. Please contact William Optics for further
details on your options to obtain service on one of our products.
William Optics Corporation (WO) neither intends to nor will ever disclose your personal
information to third parties without your consent. All company personnel with access to
customer information are aware of our policies and are trusted professionals in the field.
WO intends to enforce these provisions vigilantly for your peace of mind and protection.
Company Policies
If your purchase has incurred any damage during shipping, you didn't receive the correct
product or parts are missing, contact us or your Authorized WO Dealer within 48 h of
delivery in order for us to assist you without delay.
Carrier-caused problems must be reported to the carrier as well.
William Optics Corp.
Complete Name & Address,
Contact No. and E-mail
Purchased Product,
including Serial No. if available
Place and date of Purchase
Reasons for return
Return Authorization Number
Please read the refund policy carefully and if you have any doubt, please contact your
Authorized Dealer or William Optics Corp.
Return in perfect condition upon receiving your RA # to where instructed.
All return charges are the responsibility of the purchaser.
Privacy Policy :
Repair Policy :
Manufacturer Warranty :
Damage, Shortage & Incorrect Shipment :
If nonetheless you wish to return an item for a refund, please contact us for a return
authorization number (RA#), fill in the return form here below and return together with your
product to where instructed.
All returns to be refunded must be in perfect conditions, with original paperwork, packaging
and proof of purchase.
Refunds after 14 days from the invoice date are subject to a 15% restocking fee. No refund
will be allowed after 30 days from the invoice date.
The customer must prepay all transportation costs.
Original shipping charges, taxes or customs duties are not-refundable.
We hope that you are happy and delighted with your purchase.
Return and Refund Policy :
ZENITHSTAR 80
2005 William Optics Corp.
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Crafting the Earth's Finest Astronmical Instruments