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Celestron Canon M-Mount T-Ring A T-Ring is one of the first accessories you will need to take pictures through a telescope or spotting scope. If yo...

Pegasus USB 3.1 Gen 2 (10 Gbps) cable Type-A to Type-C 0.5 m This high-speed, premium-grade cable offers reliable data transfer speeds of up to 10 ...

Antlia ALP-T Dual Band 5nm Ha+OIII and SII+Hb Filters Package The Antlia ALP-T dual band 5nm filter is a dual line-pass filter which was designed t...

Celestron AUX Port Splitter You can easily add a second auxiliary port to your Celestron mount with the Celestron AUX Port Splitter. This parallel ...

Celestron 1.25" Variable Polarizing Filter When you want to selectively reduce the brightness of celestial objects for a customized view, the Varia...

Astrozap 8x50 Finder Scope Dew Heater The newly redesigned Astrozap 8x50 Finder Scope Dew Heaters are from the finest selection for an active dew f...

Baader Double Polarizing Filter Baader Double Polarizing Filter Screws into 1¼ or 2" eyepieces/threads. The two filters can be rotated relative to ...

Baader Diamond Steeltrack M48 Adapter BDS-Adapter with M48 outer thread to connect M48 parts Mounted instead of the standard clamp with the S58 do...

Baader CMOS-optimized L-RGB Filters New CMOS-optimized L-RGB filters from Baader Planetarium with Reflex-Blocker™ and Life-Coat™. Now with 47.4 mm ...

Astronomik CLS Filter The Astronomik CLS Filter is a budget filter for visual observation, Black & White photography and CCD photographs of neb...

Antlia IR Pass 685nm planetary 1.25" filter The Antlia IR Pass 685nm filter is an absorptive filter that allows infrared light with wavelengths of ...

Antares Finderscope 50mm Correct Image - 60° AFOV The Antares FRE50WT features correct image right angle viewing with a helical focus wire-x ...

Antares Filter Neutral Density 25% Neutral density filters can reduce brightness across the visual spectrum without losing resolution, enhanci...

Antares W70 Serie 2 4mm 70°  W70 series eyepieces offer a wider field of view and more comfortable eye relief than Plossls. The 1.25" W70-4mm has (...

Antares W70 15mm 70° The Antares W70 15mm 70° does not have negative achromat compensation, and is recommended only for telescopes with a high f/ra...

Antares Adapter for Maksutov-Cassegrain And SCT Do you want the full repertoire of Schmidt-Cassegrain accessories for your Maksutov-Cassegrain? Jus...

Antares Adapter 2" to 2" Extension ET2 extends any 2" accessory by 2". Accepts 2" filters. Double side screw with pressure band.   Technical Speci...

Antares 2" 90° Dielectric Diagonal The Antares 2" 90° Dielectric Twist-Lock Diagonal has multilayer dielectric coating with 99% reflectivity in gre...

Antares 1.25" Variable Neutral Density Filter 3-40% Neutral density filters can reduce brightness across the visual spectrum without losing resolut...

Antares 1.25" Cheshire Collimator Align your optics with a prescision Antares 1.25" Cheshire Collimator. An absolute must for Aspheric system perfo...

Antares 1.25" 45° Erecting Prism Diagonal EID45 is a 1.25" 45 degree erecting amici prism for terrestrial viewing and is not recommended for high m...

ADM D Series 3.5 lbs Counterweight with 3" Threaded Rod The ADM D Series 3.5 lbs Counterweight with 3" Threaded Rod fits D Series dovetail bars and...

Tele Vue Plössl 40mm The Tele Vue Plössl 40mm has a long eye-relief 40mm focal length with a 43° apparent field. Like the 55mm, its focal plane is...

Telrad Reflex Sight Finder with Tinted White Glass The Telrad Reflex Sight Finder is one of the best on the market. Easy to use, it can be fixed to...

Tele Vue Nagler 7mm Type 6 The 7-element, Tele Vue Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design...

Tele Vue Nagler 5mm Type 6 The 7-element, Tele Vue Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design...

Tele Vue Eyeguard Extender Many of our eyepieces, such as Radians, Delos, Nagler type 4, 55 Plössl, 41 Panoptic have adjustable height eyeguards t...

Tele Vue 4.0x 2" PowerMate T-Ring Adapter The Tele Vue 4.0x 2″ PowerMate T-Ring Adapter allows imaging through 4.0x 2″ PowerMate lens assemblies. T...