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Overview: The Advanced VX 8" Edge HD package by Celestron
consists of two separately-boxed components: the Edge 8" Optical Tube Assembly
(# 91031-XLT) and the Advanced VX Mount (# 91519). Together they provide a truly
groundbreaking package for amateur astronomers and astrophotographers. The
Advanced VX 8" Edge HD comes with a tripod with 2" diameter stainless steel
legs, and a computerized hand controller that can guide the telescope to any of
the thousands of celestial objects in its database.
Edge HD Optical System: The Edge HD optical system is
specifically designed for both visual observation and astrophotography. Many
optical systems work well for visual observing to produce pinpoint stars across
a curved focal plane. When used with a camera's flat image sensor, stars appear
out of focus at the edges. Edge HD optics produce a focal plane that is three
times flatter than a standard Schmidt-Cassegrain telescope. This gives you
visibly sharper stars across even some of the largest image sensors available.
Optics: The 8" Edge HD optical tube uses Celestron's premium
StarBright XLT coatings, which provide maximized light transmission, contrast,
and image sharpness.
Eyepiece: The telescope comes with a
eyepiece (51x magnification). The Advanced VX 8" Edge HD uses 1-1/4"
diameter eyepieces, and additional eyepieces, at different magnifications, are
available. The unit also comes with a star diagonal which diverts the light at a
90° angle to the light path of the telescope. This allows you to observe in a
more comfortable position than if you were to look straight through.
Finderscope: The telescope comes with a 9x50 finderscope
which mounts to the outside of the telescope tube to help you locate and center
objects in the main field of the telescope. The finderscope features a built-in
cross-hair reticle that indicates the center of the optical field. The
finderscope must first be aligned with the telescope before use. This is done in
the daytime by pointing the telescope at an object at least a quarter mile away,
centering the object in the eyepiece, and aligning the finderscope's cross-hairs
to the distant object.
Advanced VX Mount: The Advanced VX mount is equipped with
high-torque motors for smoothly driving heavy loads. It can accurately track
celestial objects, which is especially critical for long photographic exposures.
Large knobs are provided to help you make minute manual adjustments. Multiple
RJ-45 ports are provided on the control panel to help you control the movements
of the mount remotely.
Hand Control: The Advanced VX 8" Edge HD comes with a removable,
19-button hand controller. It plugs into the telescope's fork arm via a coiled
cord. The hand control has a red-backlit LCD window with a four-line,
18-character display screen, direction keys, and catalog keys to help you search
through the 40,000+ object database. The hand controller has a jack for an
optional RS232 cable which allows you to interface with a computer and control
the telescope remotely. A plastic snap-on
holder is included for the hand controller that attaches to one of the tripod
SkyTour: The Advanced VX 8" Edge HD's SkyTour feature allows you to
choose from a list of interesting celestial objects based on the date and time
in which you are observing. You can activate the SkyTour by pressing the
dedicated button on the hand controller, and the telescope will skew to its
starting position. As the tour of objects continues, you can press buttons on
the hand controller to provide text information and coordinates of the object
Power Requirements: The Advanced VX 8" Edge HD can be
powered by the supplied car battery adapter, the optional
PowerTank 12-volt power supply, or an optional 12-volt AC adapter.
Accessory Tray: The telescope comes with an accessory tray
which provides a place to put extra eyepieces or other items while you're using
- Optical Design: Edge HD
- Aperture: 203mm (7.99")
- Focal Length: 2032mm (80")
- Focal Ratio: f/10
- Eyepiece Focal Length: 40mm
- Eyepiece Magnification: 51x
- Highest Useful Magnification: 480x
- Lowest Useful Magnification: 29x
- Optical Tube Length: 17"
- Light Gathering Power: 841x (compared to human eye)
- Weight: 47 pounds overall
- Tripod: 18 lbs
- EQ head: 17 lbs
- Optical Tube: 14 lbs
- Minimum Mount Height: 44"
- Maximum Mount Height: 64"