Celestron Schmidt-Cassegrain SC 235/2350 EdgeHD 925 CPC Deluxe GoTo Telescope
Celestron EdgeHD optics: corrected image, sharp to the edge!
EdgeHD is Celestron's optical design designation, the "Aplanatic Schmidt-Cassegrain Telescope." After more than 50 years of success, Celestron is revolutionizing the classic Schmidt-Cassegrain telescope.
EdgeHD (English: "Edge High Definition") telescopes are true astrographs. This optical system delivers sharp, distortion-free images right to the edge of the field of view. Not only is coma corrected off the optical axis, as with other so-called "coma-free" optical designs available on the market, but also curvature of the field.
Many optical systems are propagated as "astrographs". They obtain images of stars with the desired precision, but along a curved image plane. When taking pictures with cameras, the result is a striking field curvature that increases towards the edge of the field and is all the more noticeable the larger the sensor. The stars inflate into small rings ("doughnuts") towards the edge. In addition to coma, Celestron Edge HD telescopes also correct for this curvature of field all the way to the edge. This also significantly improves resolution and cut-off size compared to competing optics with a similar aperture.
Celestron's XLT multi-coating also helps EdgeHD optics achieve a significant increase in performance compared to similar systems on the market.
The mechanics and tube of the Edge HD telescopes have been completely revised:
Mirror locks hold the main mirror in any focus position without putting pressure on the optical elements. The image always remains stable on the chip, even with long exposure times.
The ventilation openings behind the main mirror ensure rapid air exchange, so that the optics cool down quickly without equal. Thanks to an air filter system, no dust enters the tube.
€12,549.60
(VAT incl.)
Reference:
CE11008-A
The Celestron CPC Mount: The CPC-series Schmidt-Cassegrain optics are housed in a stable cast-aluminum fork mount. The optics cannot be changed. However, this disadvantage is compensated by the compact dimensions, the absence of heavy counterweights and the very good portability. However, the biggest advantage is the incredibly fast setup and adjustment. It's ready for observation in a few minutes, while others are still screwing and adjusting: simply set up the tripod at the desired extension height for seated or standing observation, level it with the built-in circular bubble, attach the yoke mount (se locks in the middle) with the three spring-loaded tripod screws store - and turn on.
SkyAlign: 16-channel GPS receiver transmits data received from the satellite for local time, date, and location coordinates to electronics. For the initialization, also called alignment, of the telescope, three bright objects in the sky must be approached one after another, it can be the moon, bright planets or bright stars. You don't have to know what those objects are. This is a great advantage, especially at the beginning of twilight!
After the third object, the telescope accurately calculates a model of its line of sight relative to the night sky. To do this, the electronics execute up to 120,000 comparison operations in a matter of seconds, as the angles between the three fixed objects are compared with the planetarium program stored in the on-board computer. This extremely simple initialization of the Goto control is called Celestron's SkyAlign.
After this alignment, more than 40,000 objects in the database are immediately available for access. However, up to 100 objects can also be stored in the controller, for example actual kites.
The control not only moves to the selected objects, but also makes recommendations for the current night and time. Information on numerous objects is also displayed via scrolling text on the hand control unit's display.
By the way: If the CPC telescope is configured in parallax with the optional polar wedge, another Celestron technology comes into play in addition to SkyAlign: thanks to All-Star Polar Alignment, no polar finder or free view of north Star is required to use the telescope to classify
The properties of the CPC mount at a glance:
Drive and mechanical base for quiet operation, with large gears and large quick couplers
Connections for AutoGuider and PC
self-centering to attach to tripod.
SkyAlign Technology – Simply select three bright objects in the sky and the telescope will tell you which ones.
Comfortable support for the hand control device: the information is visible on the screen, your hands are free to work with the optical accessories.
Database with more than 40,000 celestial objects.
The software of the manual control and the engine control unit can be updated via the Internet using Flash technology.
Oversized easy-to-find clutch knobs on both axles for manual operation.
All-metal, spring-loaded, quick-release scope mount with easy-to-use x-y adjustment.
The extremely large 25cm bearing tracking base ensures smooth and stable tracking with any size telescope.
Ergonomic construction: the telescope is very comfortable to carry from one place to another.
Permanent periodic error correction (PEC = Periodic Error Correction) with optional polar wedge for perfect astrophotos.
An important feature of CPC spotting scopes is the sturdy tripod with stainless steel tube legs and tripod spreader/accessory tray made of cast aluminum for rock solid support, with spring loaded mounting screws and center locking device for quick setup, height -adjustable for sitting or standing viewing posture.
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