Celestron CGX-L Equatorial 925 HD Telescope

• 9.25" (235mm) aperture
• f/10 focal ratio
• 2350mm 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: 0.59 arcsec (Rayleigh); 0.49 arcsec (Dawes)
• Secondary mirror obstruction: 3.35" (85mm); 36% by diameter; 13% by area

• 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

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

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

Eyepiece:

• Luminos-series wide-angle
• 82° field of view
• 2"-diameter barrel
• Accepts most 2" eyepiece filters
• 23mm focal length yields 102x power
• Parfocal with all Luminos eyepieces, allowing it to be changed out with other Luminos eyepieces without having to adjust the focus
• Retractable eyecup for use with or without eyewear

Reducer adapter:

• 2"-to-1.25" reducer adapter allows the use of smaller eyepieces and accessories in visual back or diagonal

Diagonal:

• 90° angle puts head in comfortable viewing position
• Threaded for direct connection to OTA without the need for the visual back
• 2" 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

• German equatorial mount
• Lower profile head design provides improved stability and portability
• Head can be set on a tripod in three different positions to optimize the center of balance or to provide more clearance when needed at lower latitudes
• 75 pound payload capacity, excluding counterweights
• 3-65° latitude adjustment range
• 20° of additional tracking past the meridian allows for longer observation time when viewing from a rise or hill
• Two autoguider ports provide greater cable management options to avoid wire wrap
• Long clutch levers make tightening and loosening of clutches easier for manual movement
• Strong 1.25" (31.5mm) stainless steel counterweight shaft to handle additional counterweight load
• Includes one 22 pound counterweight
• Home sensors allow the mount to always start in the index position regardless of orientation before a power reset
• Internal cabling reduces snags and other hazards
• Stationary latitude knob and linkage system that reduces the amount of friction during polar alignment
• Power input and lower accessory ports remain stationary while the mount slews to avoid snags
• Integrated handles for easy transport and setup/breakdown
• "Real Time Clock" keeps time and site information saved when power is disconnected
• On/Off rocker switch with red LED

• Dual-axis servo motors with optical encoders for smooth tracking and quiet operation
• High-torque motors provide smooth tracking and slewing for heavy OTAs and accessories
• Internal belt-drive system provides smooth, vibration-free tracking while minimizing backlash
• Spring-loaded brass worm wheel and stainless steel worm gear reduce friction and improve gear meshing
• Limit sensors automatically shut off slewing or tracking before reaching the hard stop fail safe
• Internal hard stops for both axes prevent cable tension and tripod strike
• Autoguider capable for making corrections while astroimaging
• Large 144mm-diameter worm wheels to better and more accurately drive heavier loads
• Low-friction Teflon bearings on azimuth adjustment to make adjustments easy under full load
• USB 2.0 port to connect directly to PC with PWI software
• Threaded power input barrel connector eliminates accidental disconnection
• Runs on included 12 VDC, 4A car/vehicle power supply

• Features:
• Intuitive menu-driven user interface
• PWI telescope control software features multi-point mount modeling for extremely precise pointing accuracy
• Nine slew speeds: 1/2x, 1x, 4x, 8x, 16x, 64x (0.3°/sec), 1.0°/sec, 2°/sec, 3°/sec
• Multiple tracking rates: Sidereal, Lunar, and Solar
• Anti-backlash correction trains out intrinsic play in gears for smoother movement and tracking
• Permanent Periodic Error Correction (PPEC): Improves tracking precision for long-exposure astrophotography and imaging

• Database:
• 40,000-object database
• 200 user-defined objects for customization
• Filters for creating custom object lists
• Solar system: All seven planets plus the moon, sun, and Pluto
• Custom lists of all the brightest stars, double stars, variable stars, and asterisms
• Custom lists of all the best galaxies, nebulae, and clusters
• Complete Messier catalog
• Select NGC objects

• Functions
• "All-Star Polar Alignment" software allows quick and precise polar alignment without extra polar alignment accessories, apps, or other assistance
• Additional alignment options: One- or Two-star, Solar system, Quick, and Last
• Sky Tour: Based on location, date, and time, the system shows the best objects in the sky and automatically slews to them
• Object info: Provides useful information about the selected object such as magnitude and constellation; includes extended information about 200 popular objects

• Physical characteristics:
• 2-line, 18-character LCD window with red backlighting for comfortable viewing without affecting night-adjusted vision
• 19 function keys, backlit in red
• Mini USB port: Connect to a computer for use with software programs for point-and-click slewing capability and updating firmware via PC

• Mount head only�tripod, pier, or other support system required
• Long 10.6" dual CG-5 (Vixen) and CGE (Losmandy) saddle is compatible with the widest variety of OTAs around
• Weight: 52.6 pounds