
INSTRUCTION MANUAL
®
Orion
 Mars Filter 
#5599
Figure 1. The Orion Mars Filter
The Orion Mars Filter allows you to view our second closest celestial neighbor in exceptional detail. Designed to ferret out resolution 
of Martian polar regions, highland mountain ranges, and expansive 
mare flatlands, the Orion Mars Filter is an invaluable tool for any 
planetary viewer with an interest in the red planet. 
Using the Mars Filter
To use the Mars Filter you will need to thread it into a 1.25" eyepiece that can accept threaded filters. Simply thread the filter into 
the eyepiece barrel until it is finger tight. Although not necessarily 
recommended for viewing Mars, you may also try “stacking” multiple filters by threading another into the bottom of the first.
After threading a filter into the eyepiece, place the eyepiece into 
your telescope’s focuser and bring it into focus. You should now be 
able to observe Martian landscape features in detail. 
The Orion Mars Filter is an excellent multi-purpose filter for viewing 
all features of Mars. Polar caps stand out prominently. Landscape 
features like mare and highland mountain ranges are easily separated and resolved. Polar hazes and cloud cover become visible. 
Care and Storage
When not in use, your filter should be kept in its original foam-lined 
case. Given proper care and storage, the filter should last a lifetime. 
Should a filter need cleaning for any reason, use the following 
directions to clean the filter without damaging it.
 Any quality optical lens cleaning tissue and optical lens cleaning 
fluid specifically designed for multi-coated optics can be used to 
clean the glass surfaces of the filter. Never use regular glass cleaner or cleaning fluid designed for eyeglasses. 
Before cleaning with fluid and tissue, blow any loose particles off 
the surface with a blower bulb or compressed air. Then apply some 
cleaning fluid to a tissue, never directly on the optics. Wipe the lens 
gently in a circular motion then remove any excess fluid with a fresh 
lens tissue. Oily fingerprints and smudges may be removed using 
this method. Use caution: rubbing too hard may scratch the filter 
glass. Do not remove the filter glass from its housing for cleaning
One-Year Limited Warranty
This Orion Mars Filter is warranted against defects in materials or workmanship for a period of one year from the date of purchase. This warranty is for the benefit 
of the original retail purchaser only. During this warranty period Orion Telescopes & Binoculars will repair or replace, at Orion’s option, any warranted instrument 
that proves to be defective, provided it is returned postage paid to: 
Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076.
This warranty specifically does not cover abuse, modification, mishandling, self-repair, or normal wear and tear (including mold growth).
If the product is not registered, proof of purchase (such as a copy of the original invoice) is required. This warranty gives you specific legal rights, and you may 
also have other rights, which vary from state to state. For further warranty service information, contact: Customer Service Department, Orion Telescopes.
Customer Support (800) 676-1343 
E-mail: support@telescope.com
Corporate Offices (831) 763-7000
Providing Exceptional Consumer Optical Products Since 1975
89 Hangar Way, Watsonville, CA 95076
IN 317 Rev. B 02/09