Celestron Advanced VX 9.25" EdgeHD Telescope

EdgeHD Optics: A 235mm Flat-Field System with a 42mm Image Circle

The EdgeHD optical design produces a focal plane more than three times flatter than a standard Schmidt-Cassegrain telescope. It reduces more than off-axis star coma: it gives an astrograph-quality flat focal plane all the way to the edge of the 42mm field. Every EdgeHD is tested with a camera and an artificial star before it ships.

The kit gives unparalleled views of the planets, up-close views of the lunar surface including craters and maria, and stunning deep sky images. StarBright XLT coatings cover every optical surface.

Imaging at f/10, with a Barlow, and at f/2

Each EdgeHD tube has a removable secondary mirror and is aligned on a laser bench so it is axially symmetric in any configuration.

• Native f/10: The 2350mm focal length is ideal for high-resolution planetary, lunar, and solar imaging, and provides the scale necessary to capture the smallest of deep-sky objects.
• Barlow: An optional Barlow lens adds magnification for high-resolution planetary, lunar and solar imaging.
• Ultra-Fast f/2: The optical tube is Fastar-compatible. All EdgeHD tubes are Fastar compatible for ultra-fast f/2 wide-field imaging with a third-party lens accessory in place of the secondary mirror.

Imaging-Focused Design: Mirror Clutches, Vents, and 146.05mm Back Focus

The EdgeHD optical tube is engineered with features specifically for astrophotography. Flexible tension clutches hold the primary mirror in place after focusing, reducing image shift during long exposures. Once engaged, the clutches keep the image centered on the sensor without putting force on the mirror assembly.

Cooling vents on the rear cell allow hot air to be released from behind the primary mirror, and each vent has an integrated 50-mesh filter that keeps dust out. The optical design specifies a precise back focus of 146.05mm (5.75") from the rear cell's 3.290"x16 tpi thread, ensuring optimal edge performance with your camera and accessories.

Advanced VX Mount: A 30 lb Capacity GoTo Platform

The Advanced VX is the smallest of Celestron's German equatorial mounts. Its 30 lb payload capacity, not counting counterweights, offers in Celestron's words a sturdy platform for the 9.25" EdgeHD even with optional accessories like StarSense AutoAlign, a Focus Motor, a finderscope and a camera. It has permanently programmable periodic error correction (PPEC) and All-Star Polar Alignment, which works without a view of Polaris.

The mount head weighs 17 lbs. The DC servo motors provide responsive slewing at up to 4° per second and precise tracking at sidereal, solar, and lunar rates. Two 12 lb counterweights are included, and the mount has ports for the hand control, an autoguider and two AUX accessories.

Stability and Compatibility: 2" Steel Legs and a Dual CG-5/CGE Saddle

The AVX mount is supported by a robust tripod with 2" diameter stainless steel legs, providing an extra-wide stance for improved stability. An accessory tray is included.

The dual saddle plate accepts CG-5 and CGE-style dovetails; you switch by moving the hand knobs to a separate set of holes. It takes Vixen format dovetails 100mm or longer.

NexStar+ and PWI: 40,000+ Objects and Advanced Mount Modeling

At the heart of the AVX is the NexStar+ hand controller, which gives you access to a database of over 40,000 celestial objects. The kit also includes Celestron PWI (CPWI), co-developed with PlaneWave Instruments, with a graphical planetarium interface, PointXP mount modeling with 100+ alignment points, alignment save and reload, scope parking and a complete ASCOM interface for third-party software.

Your purchase also includes Celestron's Starry Night Special Edition Software, which helps you plan sessions and includes telescope control from a PC. The NexStar+ hand control has a USB port.