CECGEMII925K

12018

Celestron

Celestron put together the CGEM II 925 EdgeHD 9.25" f/10 SCT GoTo EQ Telescope to provide a complete observational platform that includes a large-aperture optical tube assembly (OTA), the NexStar+ computer hand controller, a powerful and stable motorized equatorial mount and tripod, plus an array of accessories to get you set up and observing the moon, planets, and especially deep-sky subjects like nebulae, galaxies, and star clusters.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 eyepieces and accessories in visual back or diagonalDiagonal:90 angle puts head in comfortable viewing positionThreaded for direct connection to OTA without the need for the visual back2" eyepiece/accessory holderStar diagonal corrects image horizontally, but not verticallyFinderscope:Low 9x magnification preserves wide field of view to more easily find alignment or guide starsLarge 50mm aperture helps to see dimmer objects and stars for easier star-hopping navigation