CEEDGEHD925

91040-XLT

Celestron

Engineered to deliver sharp and clear distortion-free views, the Celestron EdgeHD 9.25" f/10 Aplanatic Schmidt-Cassegrain Telescope is an ideal choice for observation, astrophotography, and imaging objects within or beyond our solar system. It features an aplanatic Schmidt-Cassegrain optical system consisting of a corrector plate, a spherical primary mirror, and a secondary mirror along with a set of field-flattening lenses integrated into the baffle tube. Complementing the EdgeHD system is the proprietary StarBright XLT optical coating system, which improves light transmission and reflectivity across the entire visual spectrum. The combination of EdgeHD and StarBright XLT produces bright and clear high-resolution images with true color rendition across the entire field of view without distortion, aberrations, or off-axis comas.Optimized for imaging, the internal focusing system features mirror support clutches to ensure proper alignment and mirror locks to avoid accidental defocusing during long-exposure astrophotography. The optical tube is outfitted with an oversized 2" visual back to ensure large imaging sensors are completely covered to avoid vignetting. For visual observations, a 2" star diagonal is included along with a 23mm wide-angle eyepiece that yields a 102x magnification. A reducer adapter is provided to allow the use of smaller and more common 1.25" eyepieces and accessories. The EdgeHD 9.25 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 it comes with a large CGE dovetail plate that is compatible with Losmandy saddles.Optical Tube 9.25" (235mm) aperturef/10 focal ratio2350mm effective focal lengthAplanatic Schmidt-Cassegrain optical designEdgeHD 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 edgesDiffraction-limited SCHOTT glass reduces internal light loss to improve color, clarity, and sharpnessStarBright XLT optical coatingsFlexible tension clutches hold the primary mirror in place to reduce image shift without putting any force or pressure on the mirror assembly, keeping subjects centeredInternal mirror locks prevent accidental adjustment to focus important during long-exposure astrophotographyIntegrated 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 temperaturesResolution: 0.59 arcsec (Rayleigh); 0.49 arcsec (Dawes)Secondary mirror obstruction: 3.35" (85mm); 36% by diameter; 13% by areaStarBright XLT System Maximizes light transmission through optical pathImproves color rendition, contrast, sharpness, resolution, and brightnessBroadband system provides flat wavelength transmission across the entire visual spectrumMulti-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 titaniumHigh-transmission water white glass corrector plate limits light loss due to internal absorptionMounting OTA only; mount and tripod required for proper useLarge CGE (Losmandy-style) dovetail plateIncluded Accessories Visual Back:Standard Schmidt-Cassegrain telescope (SCT) threads2" eyepiece/accessory holderUse for prime focus or projection astrophotography with optional adaptersEyepiece:Luminos-series wide-angle82 field of view2"-diameter barrelAccepts most 2" eyepiece filters23mm focal length yields 102x powerParfocal with all Luminos eyepieces, allowing it to be changed out with other Luminos eyepieces without having to adjust the focusRetractable eyecup for use with or without eyewearReducer adapter:2"-to-1.25" reducer adapter allows the use of smaller e