Products

Use this adapter to connect a T-ring or T-mount camera to a 1.25" focuser. Low profile design keeps backfocus short. Threaded for standard 1.25" fi...

Use this female T-thread to male T-thread spacer to extend standard T-thread adapters by 16.5mm.

Why a 1600GTO? Thirty plus years of mount design and building expertise has been employed to engineer and manufacture our new 1600GTO mount into th...

Why a 1600GTO? Thirty plus years of mount design and building expertise has been employed to engineer and manufacture our new 1600GTO mount into th...

Why a 1600GTO? Thirty plus years of mount design and building expertise has been employed to engineer and manufacture our new 1600GTO mount into th...

16mm Focal Length 68° Apparent Field Argon-purged Waterproof EMD Coatings 1.25" Barrel

This is a scaled down version of the "king of the field" 31mm Nagler Type 5.The new 16mm Nagler Type 5 is a smaller, lighter (0.45 lbs.), 1.25" onl...

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,...

Explore Ultra-Wide Eyepieces - Comfort, Quality, Value. The Explore Scientific 92° Series™ eyepieces are hyper-wide class oculars that can transfor...

The Televue 17mm Ethos Eyepiece provides a 100° apparent field for a true "spacewalk" view of the night sky. Distortion correction, high contrast a...

The Nagler eyepiece represents the ultimate in the visual stargazing experience. With an 82-degree field of view, and tack-sharp, high-contrast opt...

Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coating...

Modifying Al Nagler's patented Wide-Field eyepiece and adding high index glasses to the 6-element system, the Panoptic design approaches "Nagler" p...

This replacement adapter came with the original Starizona RASA8 Filter Slider converting the bottom M48 to M42 and adding 1mm to the Filter Slider ...

Our Advanced Convertible Barlow has a unique design that provides several configurations to increase the focal length of your telescope. It was de...

This adapter threads into the front (telescope side) threads of the SkyWatcher EvoStar ED focal reducer, allowing the reducer to be placed directly...

The Celestron 2” to 1.25” Adapter with Twist-Lock was designed for visual observers who use both 2” and 1.25” eyepieces regularly and need a quick...

2" diameter extension tube, adds 2" of length to optical path. Ideal for achieving focus with eyepieces or cameras. Features brass clamp ring.

Introducing Celestron's new 2" XLT Diagonal. This high quality multi-coated mirror diagonal allows you to take advantage of the wider field of view...

Powermate Concept: While Barlows are powerful tools, the negative element defining them also limits their ability. The simple negative element Barl...

A portable guidebook for enjoying the night sky in 2023. 2023 Night Sky Almanac is the ideal resource for both novice and experienced sky watcher...

Nitrogen-Purged and Waterproof: Internally sealed and purged with inert, dry nitrogen gas to prevent internal fogging, to halt the intrusion of fin...

20mm Focal Length 68° Apparent Field Argon-purged Waterproof EMD Coatings 1.25" Barrel

Maximize your "spacewalk" experience with the 21mm Ethos. Transform your passage through the Milky Way with the 21mm’s nexus of contrast, power and...