Celestron EdgeHD CGE 8″ F/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)(Celestron Edgehd Cge 8 F 10 Aplanatic Schmidt Cassegrain Telescope Ota Only)

Optical Tube

• 8″ (203.2mm) aperture
• f/10 focal ratio
• 2032mm effective focal length
• Aplanatic Schmidt-Cassegrain optical design
• EdgeHD field-flattener aplanatic design eliminates spherical aberration, field curvature, and off-axis star coma to improve resolution, sharpness, and clarity across the entire field of view, especially at the edges
• Diffraction-limited SCHOTT glass reduces internal light loss to improve color, clarity, and sharpness
• StarBright XLT optical coatings
• Flexible tension clutches hold the primary mirror in place to reduce image shift without putting any force or pressure on the mirror assembly, keeping subjects centered
• Internal mirror locks prevent accidental adjustment to focus�important during long-exposure astrophotography
• Integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror without dust getting in, to prevent mirror distortion due to uneven surface temperatures
• Resolution: 0.69 arcsec (Rayleigh); 0.57 arcsec (Dawes)
• Secondary mirror obstruction: 2.7″ (69mm); 34% by diameter; 11% 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

• OTA only; mount and tripod required for proper use
• Large CGE (Losmandy-style) dovetail plate

Included Accessories

Visual Back:

• Standard Schmidt-Cassegrain telescope (SCT) threads
• 1.25″ eyepiece/accessory holder
• Use for prime focus or projection astrophotography with optional adapters

Eyepiece:

• Plössl lens configuration
• 1.25″-diameter barrel
• Accepts most 1.25″ eyepiece filters
• 40mm focal length yields 51x power

Diagonal:

• 90° angle puts head in comfortable viewing position
• Threaded for direct connection to OTA without the need for the visual back
• 1.25″ eyepiece/accessory holder
• Star diagonal corrects image horizontally, but not vertically

Finderscope:

• Low 9x magnification preserves wide field of view to more easily find alignment or guide stars
• Large 50mm aperture helps to see dimmer objects and stars for easier star-hopping navigation