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This double ring set offers improved stability over single camera body mounting rings for using a ZWO camera with a DSLR camera lens.  The ring set...

ZWO’s 16.5 mm M48 spacer is a aluminum extension ring designed to reach optical spacing in imaging systems that require a precise backfocus. It fea...

Extra-Low Dispersion (ED) objective lenses provide high resolution, high contrast images virtually free of optical defects like chromatic aberrati...

Tele Vue is pleased to introduce the Delos, mid-to-short focal length line of 20mm eye-relief, 72° apparent field of view eyepieces. Every optical,...

The perfect telescope for the small home observatory The Airy Disk 140mm Apochromat represents a top-tier telescope designed to meet the needs...

Replacement 2" holder for Quattro focusers that features a brass clamp ring and much tighter inside diameter tolerance to better hold imaging acces...

M68 Sensor Tilt Plate M68 sensor tilt plate (5mm) is independently developed by ZWO and specially made to match with the full-frame cooled camera Z...

• Waterproof • Tear-Resistant • Stargazer Map and Guide Every culture has drawn pictures in the stars, creating constellations that represent anima...

In astrography, Nikon, Canon, Sony mirrorless cameras have been used more and more frequently by astronomy amateurs in recent years. Therefore, on ...

The Celestron Labs CB2000C Binocular Compound Microscope offers all the advanced features you’re looking for. With 10x and 20x eyepieces and 4 incl...

Celestron’s proprietary XLT fully multi-coated optics increase light transmission through the optical path to deliver crisp, high contrast images ...

Discover a universe of fun and amazing facts about space for kids 6 to 9 Take an exciting, fact-filled journey that goes where all great space boo...

What are constellations? Where did they get their names? What is a falling star? What and where is the zodiac? Is the North Star the brightest star...

"Wildflowers of Southeast Arizona: People exploring nature in Southeast Arizona can use this handy photographic field guide to identify common nati...

Bats are one of the most unique and mysterious animals on earth. You may have feared them or have been fascinated by them. Either way, you have wan...

The wild mammals of Arizona are often elusive and difficult to locate. They range from deserts to mountain tops. Their tracks, scats, and signs may...

Reptiles and Amphibians of the Sonoran Desert: A guide to 41 of the most commonly encountered reptiles and amphibians native to the Sonoran Desert ...

Did you know culinary salt is the mineral halite? Or that the pigment vermillion is powdered cinnabar, a mineral whose name comes from the Persian ...

The quintessential A-Z guide, this is a book that anyone interested in birds will want to have close at hand. First published more than twenty year...

Explore and "color in" the amazing world of minerals and crystals... readers and rockhounds of all ages and skill levels will love this book! Learn...

11" diffraction limited Schmidt-Cassegrain telescope Celestron's premium StarBright XLT coatings Fully computerized dual fork arm Altazimuth mount...

ASI294MC ASI294 is the first camera in the world that equiped with SONY latest sensor IMX294CJK. Diagonal 21.63 mm (Type 4/3) Approx. 10.71M-Eff...

This adapter can be used as a 1.25" nosepiece for any camera that has C-mount (1") threads. The adapter has male C-threads on the camera side, and ...