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Astrozap Astrozap AZ-143 Flexible Dew Shield for Orion 150mm Mak
Orion 150mm Mak Cass Flexible Plastic Dew Shield
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Astrozap AZ-143 Flexible Dew Shield for Orion 150mm Mak
$39.55
Astrozap Astrozap AZ-104 Flexible Dew Shield for Celestron NexStar 4/4SE and 102 SLT - with No Notches
Celestron Nexstar 4 & 4SE Flexible Plastic Dew Shield, No Notch
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Astrozap AZ-104 Flexible Dew Shield for Celestron NexStar 4/4SE and 102 SLT - with No Notches
$30.75
AstroSystems AstroSystems LightPipe/SightTube Combination
This unique and innovative collimator combines the LightPipe with the SightTube into one easier to use, lower-cost tool.
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AstroSystems LightPipe/SightTube Combination
$69.99
Howie Glatter Howie Glatter Holographic Grid Attachment for Collimator
Square Grid Projection Attachment. A wide pattern spanning 21 degrees, best for fast scopes down to f/2.7
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Howie Glatter Holographic Grid Attachment for Collimator
$80.00
Celestron Celestron Case for NexStar 8 and 9.25 & 11" OTAs
The NexStar carrying case is designed to safely carry your NexStar SE series telescope along with any 8”, 9.25” or 11” Schmidt-Cassegrain or EdgeHD optical tube.
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Celestron Case for NexStar 8 and 9.25 & 11" OTAs
$469.95
Arcturus Eyepiece Rear Cap 1.25 (Pack of 4)
These caps and plugs are made from durable low density polyethelene.
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Eyepiece Rear Cap 1.25 (Pack of 4)
$5.00
DayStar DayStar Filters White-Light ULF Solar Filter for Cameras or Small Telescopes
Safe Foldable Solar Lens Filter for Cameras.  
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DayStar Filters White-Light ULF Solar Filter for Cameras or Small Telescopes
$29.95
Sky-watcher Evostar 72 Refractor (Pre-owned) (CHECK FOCUSER)
Sky-watcher Evostar 72 Refractor (Pre-owned) (CHECK FOCUSER)
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Sky-watcher Evostar 72 Refractor (Pre-owned) (CHECK FOCUSER)
$0.00
PrimaLuceLab PrimaluceLab PLUS Support Rings
The PLUS support rings (available in 19 different sizes!) are designed to be used with various diameters of tube refractor telescopes. In this way, for example, you can install both above and below the optical tube our PLUS plates or even guide rings.
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PrimaluceLab PLUS Support Rings
$364.00
Ansel Adams: The Eloquent Light - Hardcover Book (Pre-owned)
Ansel Adams: The Eloquent Light - Hardcover Book by Nancy Newhall
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Ansel Adams: The Eloquent Light - Hardcover Book (Pre-owned)
$25.65
Fundamental Astronomy: Second Enlarged Edition - Paperback Book (Pre-owned)
Fundamental Astronomy: Second Enlarged Edition - Paperback Book by H. Karttunen
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Fundamental Astronomy: Second Enlarged Edition - Paperback Book (Pre-owned)
$25.84
Celestron Vintage Celestron C90 Maksutov Spotting Scope with Hard Case (Pre-owned)
Pre-owned Vintage Celestron C90 Maksutov Spotting Scope with Hard Case, Finder, Diagonal, Kellner Eyepiece, Barlow Lens, and SCT Thread Adapter
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Vintage Celestron C90 Maksutov Spotting Scope with Hard Case (Pre-owned)
$150.00
Coronado Coronado PST with Hard Case and 20mm Kellner Eyepiece (pre-owned)
Coronado PST with Hard Case and 20mm Kellner Eyepiece (pre-owned)
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Coronado PST with Hard Case and 20mm Kellner Eyepiece (pre-owned)
$1,199.00
William Optics William Optics Ultra-Cat 131
Designed for serious astrophotographers and observatories alike, the Ultra-Cat 131 combines a fast focal ratio with uncompromising optical precision, enabling stunning deep-sky detail, rich contrast, and immersive wide-field compositions.
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William Optics Ultra-Cat 131
$5,398.00
Sigma Sigma 35mm F1.4 DG II Art
Powerful, portable, and optically refined—the 35mm F1.4 DG II Art delivers professional-grade performance in a beautifully balanced everyday prime.
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Sigma 35mm F1.4 DG II Art
$1,059.00
Vivitar Altura Photo 58MM 0.35x Fisheye Wide Angle Lens (w/Macro Portion) for DSLR Cameras
Easily screws on to the front of your lens
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Altura Photo 58MM 0.35x Fisheye Wide Angle Lens (w/Macro Portion) for DSLR Cameras
$49.99
Arcturus Telrad Dew Shield (LIMITED QUANTITIES)
Arcturus Telrad Dew Shield (LIMITED QUANTITIES)
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Arcturus Telrad Dew Shield (LIMITED QUANTITIES)
$20.00
Spike-a Metal Bahtinov Mask for 8" SCT's (Pre-Owned)
Spike-a Metal Bahtinov Mask for 8" SCT's (Pre-Owned)
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Spike-a Metal Bahtinov Mask for 8" SCT's (Pre-Owned)
$35.00
Universal Astronomics Replacement Handle Only for UA Mounts (Pre-owned)
Universal Astronomics Replacement Handle Only for UA Mounts (Pre-owned)
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Universal Astronomics Replacement Handle Only for UA Mounts (Pre-owned)
$35.00
The Argus 35mm Guide and Reference Book by Kenneth Tydings 1954 (Pre-Owned)
The Argus 35mm Guide and Reference Book by Kenneth Tydings 1954 (Pre-Owned)
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The Argus 35mm Guide and Reference Book by Kenneth Tydings 1954 (Pre-Owned)
$8.99
Orion Mars Filter 1.25
Orion Mars Filter 1.25
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Orion Mars Filter 1.25
$59.95
Nikon SP 35mm Rangefinder with Nikkor-S 50mm 1.4 (Pre-owned)
Nikon SP 35mm Rangefinder with Nikkor-S 50mm 1.4 (Pre-owned)
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Nikon SP 35mm Rangefinder with Nikkor-S 50mm 1.4 (Pre-owned)
$995.00
iOptron iOptron Hard Case for CEM40
This Hard Case for CEM40 mount protects your mount whether you're heading out for a night of observation, or when you need to store it.
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iOptron Hard Case for CEM40
$128.00
Celestron AC Adapter for Tetraview Microcsope
Celestron AC Adapter for Tetraview Microcsope
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Celestron AC Adapter for Tetraview Microcsope
$49.99