Optical Tube Assemblies(OTA's)

Pre-Order Celestron 6” Rowe-Ackermann Schmidt Astrograph (RASA 6) Optical Tube Assembly (CG-5 Dovetail) Lightning-Fast Imaging: RASA’s legendary ultra-fast f/2.2 optics let you capture deep-sky images with briefer sub-exposures and less...

Celestron 8in Rowe-Ackermann Schmidt Astrograph OTA 8in Rowe-Ackermann Schmidt Astrograph (RASA 8) Flat field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor. Unlike the larger...

Celestron C11 SCT OTA - CGE The Schmidt Cassegrain Telescope(SCT) is a hybrid optical design termed catadioptric. The modern SCT is a popular telescope design due to it's compact size vs aperture. StarBright XLT coated optics housed in a lightweight...

Celestron C6 SCT OTA - CG5 The Schmidt Cassegrain Telescope(SCT) is a hybrid optical design termed catadioptric. The modern SCT is a popular telescope design due to it's compact size vs aperture. StarBright XLT coated optics housed in a lightweight...

Celestron C8 SCT OTA - CGE The Schmidt Cassegrain Telescope(SCT) is a hybrid optical design termed catadioptric. The modern SCT is a popular telescope design due to it's compact size vs aperture. StarBright XLT coated optics housed in a lightweight...

Celestron C925 SCT OTA - CGE The Schmidt Cassegrain Telescope(SCT) is a hybrid optical design termed catadioptric. The modern SCT is a popular telescope design due to it's compact size vs aperture. StarBright XLT coated optics housed in a lightweight...

Celestron EdgeHD 800 OTA - CGE Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces. Aluminum...

Celestron EdgeHD 925 OTA - CGE Optical Design: EdgeHD Aperture: 234.95mm (9.25") Focal Length: 2350mm (93") Focal Ratio: f/10 Focal Length of Eyepiece 1: 23mm (0.91") Magnification of Eyepiece 1: 102x Finderscope: 9x50 Star Diagonal: 2"...

Sky-Watcher Esprit 80 ED APO refractor   Included: Helinear Track focusing system with zero image shift. 8 x 50 right angle finderscope 2-inch Star diagonal 2-element field flattener Camera adapter D-style dovetail Padded case Specs SKU:...

Sky-Watcher Evoguide 50 APO 50mm f/4.8 Apochromatic Doublet refractor  242mm focal length  1.25” helical focuser Uses expertly matched ED glass to deliver dramatic, coal-black skies and faithful, contrast-rich views Prime focus...

Sky-Watcher Quattro 150P Imaging Newtonian 6" 150mm aperture, 600mm focal length  Fast f/4 focal ratio  Parabolic borosilicate mirrors utilizing Sky-Watcher’s proprietary Radiant ™ Aluminum Quartz (RAQ™)...

Sky-Watcher Quattro 200P Imaging Newtonian 205mm aperture, 800mm focal length Fast f/4 focal ratio Parabolic mirror designed for imaging with 94% reflectivity 10:1, dual-speed, 2-inch Crayford-style focuser Oversized secondary mirror produces greater...

Sky-Watcher Quattro 250P Imaging Newtonian 254mm aperture, 1000mm focal length  Fast f/4 focal ratio Parabolic mirror designed for imaging with 94% reflectivity 10:1, dual-speed, 2-inch Crayford-style focuser Oversized secondary mirror...

Sky-Watcher Quattro 300P Imaging Newtonian 305mm aperture, 1200mm focal length Fast f/4 focal ratio Parabolic mirror designed for imaging with 94% reflectivity 10:1, dual-speed, 2-inch Crayford-style focuser Oversized secondary mirror produces greater...

Sky-Watcher Quattro Coma Corrector

Sky-Watcher Skymax 102 Maksutov-Cassegrain optical design Primary and secondary mirrors feature proprietary Radiant™ Aluminum Quartz™ (RAQ™) coatings Corrector plate featuring Metallic High-Transmission Coatings™ (MHTC™)...