Striking a comfortable balance between power and portability, the Celestron C6-A-XLT CG-5 6" f/10 Schmidt-Cassegrain Telescope is an ideal choice for observing objects within or beyond our solar system. It features a Schmidt-Cassegrain optical system consisting of a corrector plate, spherical primary mirror, and secondary mirror that work together to reduce spherical and chromatic aberrations for crisp and clear high-resolution images with accurate color representation without distortion, especially at the edges. Complementing the optical system is the proprietary StarBright XLT optical coating system, which improves light transmission and reflectivity across the entire visual spectrum.
The optical tube is outfitted with a standard 1.25" visual back to make it easier to find eyepieces, accessories, and imaging gear. For visual observations, a 1.25" star diagonal is included along with a 25mm eyepiece that yields 60x magnification. The C6-A-XLT is offered here without a mount or tripod for users who already have a reliable support system and are looking to upgrade or add to their existing gear, but comes with a standard-sized CG-5 dovetail plate that is compatible with Vixen-style saddles.
Optical Tube
6" (150mm) aperture
f/10 focal ratio
1500mm effective focal length
Schmidt-Cassegrain catadioptric optical design
StarBright XLT optical coatings
Resolution: 0.93 arcsec (Rayleigh); 0.77 arcsec (Dawes)
Secondary mirror obstruction: 2.2" (69mm); 37% by diameter; 14% by area
StarBright XLT System
Maximizes light transmission through optical path
Improves color rendition, contrast, sharpness, resolution, and brightness
Broadband system provides flat wavelength transmission across the entire visual spectrum
Multi-layer mirror coatings with layers of aluminum, SiO2 (quartz), and TiO2 (titanium dioxide)
Multi-layer anti-reflective corrector plate coatings with layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide); hafnium has a wider band-pass than the commonly used titanium
High-transmission water white glass corrector plate limits light loss due to internal absorption
Mounting
Optical tube assembly (OTA) only, mount and tripod required for proper use
Standard CG-5 (Vixen-style) dovetail plate for compatible saddles
OTA weight: 10 pounds
Included Accessories
Visual back:
Standard Schmidt-Cassegrain telescope threads
1.25" eyepiece/accessory holder
Use for prime focus or projection astrophotography with optional adapters
Eyepiece:
1.25"-diameter barrel
Accepts most 1.25" eyepiece filters
25mm focal length yields 60x power
0.83° apparent angle of view
44' field of view at 1000 yards
Diagonal:
90° angle puts head in comfortable viewing position
Threaded for direct connection to OTA without the need for the visual back
1.25" snout and eyepiece/accessory holder
Star diagonal corrects image horizontally, but not vertically
Finderscope:
Low 6x magnification preserves wide field of view to more easily find alignment or guide stars
30mm aperture helps to see dimmer objects and stars for easier alignment and star-hopping navigation
