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Product Description This precision-machined 15 mm M48 Extension Tube is designed to provide an exact increase in optical path length for fine-tunin...

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...

With 110°, the Ethos-SX has 21% more apparent FOV area than the 100° Ethos design. This permits a nice 62% power increase from a 6mm Ethos, while r...

Concept: Just as Delos eyepieces were developed based on Tele Vue's Ethos eyepiece design advancements, DeLite is the logical step toward a smaller...

Our extremely popular Filter Slider is now available for the Celestron Origin!  The Filter Slider allows easy swapping of standard 2" filters.  The...

Pre-Order Now! Press release from Tele Vue: ConceptThe Nagler Type 7 series was developed as a natural extension of our highly regarded, 85°,limite...

The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Na...

ED objective lenses provide superior images virtually free of chromatic aberration with accurate color reproduction, increased resolution and con...

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

The Starizona SCT Corrector requires the proper camera adapter to achieve the correct lens-to-CCD distance. This ensures the best optical performan...

Honders Advanced Catadioptric optical design Radiant Aluminum Quartz (RAQ)™ mirror coatings Wide-open 250mm focal length FAST f/2 focal ratio 5-in...

• Waterproof • Tear-Resistant • Stargazer Map and Guide The name Solar System is derived from "Sol" or sun, and describes our planetary system orbi...

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

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

ED objective lenses provide superior images virtually free of chromatic aberration with accurate color reproduction, increased resolution and cont...

Powerful 20x optical system for an image that is close-up to the action Large 50mm objective lenses with tremendous light gathering capability Hig...

The largest aperture scope in the Ultima line, the 100mm Ultima offers more than 50% brighter images than the 80mm, allowing for better performanc...

The iconic saguaro cactus is one of thousands of species of plants growing in the diverse ecosystems found throughout the southwestern deserts. Thi...

The Perfect Guide to Rocks and Minerals Across the United States Keep this tabbed booklet close at hand on your next rock-hunting adventure. Based ...

Perfect for stargazers and armchair astronomers of all ages, CONSTELLATIONS is a beautifully illustrated, fascinatingguide to all 88 constellations...

Eyepieces at or near the 10mm range are often considered a mandatory focal length in your collection, as this focal length range is departure p...

Askar MCP90 (Multi-Connection Plate 90) is a professional design especially for FRA400/5.6 astrograph. But it also works well with other various ha...

3 element - 0.75x-Flat Field for sharper stars all to way to the edge.  Specifically made for the 106mm APO. Screws on to the M63x1-Thread. 0.75x f...

This version of the C14 MicroFocuser will fit both the Edge HD and new-style non-HD 14" SCTs from Celestron. The "new-style" non-HD C14s have the s...