Celestron C6 SCT OTA - CG5 Dovetail

The Celestron C6-A OTA is a versatile optical tube featuring a 1500mm focal length and f/10 focal ratio. Its 6-inch aperture provides 40% more light-gathering capability than a 5-inch Cassegrain telescope, making it excellent for viewing both bright and faint celestial objects. Equipped with Celestron’s patented StarBright® XLT optical coatings, the C6-A delivers improved light transmission and contrast for brighter deep-sky images and shorter exposure times. These enhanced optics also help reveal subtle details on the Moon and planets, as well as faint galaxies and nebulae. The C6-A can be paired with a variety of computerized telescope mounts using its CG-5 dovetail bar. It can also be used with a basic manual altazimuth mount for nighttime observing or as a terrestrial spotting scope during the day. With its combination of portability, ease of handling, light-gathering capability, and affordability, the C6-A is a versatile choice for amateur astronomers of various experience levels.

StarBright XLT coatings

StarBright XLT is Celestron’s revolutionary optical coating system. It consistently outperforms all other coatings in the commercial telescope market. There are three major components that make up our StarBright XLT high-transmission optical system design:

• Unique enhanced multi-layer mirror coatings made from precise layers of aluminum, SiO2 (quartz), TiO2 (titanium dioxide), and SiO2 (silicon dioxide). Reflectivity is fairly flat across the spectrum, optimizing it for both imaging and visual observing.
• Multi-layer anti-reflective coatings made from precise layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide). Hafnium—a rare element that costs nearly $2,000 per kilogram—gives us a wider band pass than the titanium used in competing coatings.
• High-transmission water white glass is used instead of soda lime glass for the corrector lens. Water white glass transmits about 90.5% of light without anti-reflective coatings; that’s 3.5% better than uncoated soda lime glass. When water white glass is used in conjunction with StarBright XLT’s anti-reflective coatings, the average transmission reaches an astonishing 97.4.

Features

• 6" Schmidt-Cassegrain optical tube assembly (OTA)
• Features Celestron's premium patented StarBright XLT optical coatings
• 1500 mm focal length (f/10)
• Tube constructed of durable and lightweight aluminum
• Includes: 25mm eyepiece (60x), 6x30 optical finderscope, star diagonal, 1.25” visual back, CG-5 dovetail bar