Celestron EdgeHD 9.25" Optical Tube with CGE Dovetail

DESCRIPTION

The Celestron EdgeHD 9.25" is a flat-field Schmidt-Cassegrain telescope delivering outstanding performance for imaging and visual observation. The aplanatic optical system eliminates off-axis coma and provides a flat focal plane, ensuring sharp stars even at the edge of the field.

All optical surfaces feature StarBright XLT coatings for maximum light transmission. Mechanically, the tube includes vented rear cells with integrated filters, mirror clutches to prevent image shift during imaging, and full compatibility with Fastar accessories for wide-field f/2 astrography.

Included are a 9x50 finderscope, 2" diagonal with 1.25" adapter, and a wide-angle 23 mm Luminos eyepiece.

TECHNICAL SPECIFICATIONS

• Optical design: EdgeHD Schmidt-Cassegrain
• Aperture: 234.95 mm
• Focal length: 2350 mm
• Focal ratio: f/10
• Tube length: 559 mm
• Tube diameter: 271.78 mm
• Optical tube weight: 9.53 kg (21 lbs)
• Included eyepiece: 23 mm (102x magnification)
• Finderscope: 9x50
• Diagonal: 2" with 1.25" adapter
• Highest useful magnification: 555x
• Lowest useful magnification: 34x
• Limiting stellar magnitude: 14.4
• Resolution (Rayleigh): 0.59"
• Resolution (Dawes): 0.49"
• Secondary obstruction: 85 mm (36% by diameter, 13% by area)
• Light gathering power: 1127x the human eye
• Optical coatings: StarBright XLT
• Mounting: CGE dovetail
• Solar warning: requires appropriate solar filter for sun observation