Optical tube Celestron Schmidt-Cassegrain CELESTRON EDGE HD 9.25" with optical system designed to reduce off-axis coma effect and to give a uniform photographic focal plane.
| Carrier | Description | Estimated Delivery | ||
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Home delivery - International | Home delivery - International |
Wednesday, 25 September - Wednesday, 2 October |
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Home delivery - International
Home delivery - International
Estimated delivery:
Wednesday, 25 September - Wednesday, 2 October
Optical Tube Celestron Edge HD 925 XLT 235mm Ø 91040-XLT
SEE THE SPECIAL PRICE FOR THIS TELESCOPE, WE WILL MATCH THE BEST OFFER YOU GET.
See the universe in HD: EdgeHD is an optical tube Celestron Schmidt-Cassegrain Aplanatic designed to provide aberration-free images over a wide field of view and photographic field of view. The optical system was designed to reduce not only the off-axis coma effect, but also to provide a completely uniform photographic focal plane over the entire field of view.
True astrographic quality: Many self-described "astrographic" quality optical designs actually produce point stars along a curved focal plane. While this may be acceptable in visual observations, stars will appear out of focus at the edges when using flat CCD sensors of digital cameras. The EdgeHD optics of the Celestron optical tubes produce a focal plane three times more uniform than that offered by classic Schmidt-Cassegrain telescopes and radically flatter than other coma-free designs. This ensures that the user will obtain perfectly sharp images across the entire field of the largest CCD sensors currently available.
Enhanced Performance: The performance of the EdgeHD design not only delivers sharp and pleasing images, but also improves the resolution and magnitude limit relative to other telescopes of similar apertures. The high-definition optics of Celestron allow small spot sizes to be resolved across the entire field, revealing fine detail and high contrast.
Brighter images: EdgeHD optics provide smaller (more concentrated) stars that create brighter images and allow fainter magnitudes to be achieved relative to other telescopes of similar sizes. Poor image quality at the edges can widely scatter starlight to match the brightness of the sky background, making stars undetectable to the eye or a camera. With EdgeHD optics the user will be able to capture the faintest galaxies across the entire field of a camera's sensor.
XLT Coating: Each optical surface of the Celestron telescopes is coated with the XLT treatment. EdgeHD series models offer maximum light transmission across the entire field of view and photographic spectrum.
Mechanical features: In addition to the new optimized optical design, the EdgeHD series tubes have been redesigned to provide the highest possible performance for every observation.
Mirror support: Flexible tension clutches hold the mirror in position and reduce image wobble as the tube rotates around the mount. Flexible rods hold the mirror in position without exerting any pressure or force on the holder, keeping the image centered in the eyepiece (or chip).
Tube vents: Two vents at the rear of the tube allow hot air to be expelled from the primary mirror. Each vent has an integrated 60-micron micro-mesh filter that allows air to be expelled without dropping dust particles inside.
Fastar Versatility: The EdgeHD series includes the most versatile telescopes available today. With the classic f/10 the user can obtain the image scale needed to capture the smallest deep sky objects. With an optional dedicated reducer it is possible to increase the field of view without sacrificing optical performance. A barlow lens provides the added magnification needed for high planetary, lunar and solar imaging resolutions. And all EdgeHD optical tubes are Fastar compatible for ultra-fast wide-field imaging - f/2. Each tube is supplied with a removable secondary mirror and is opto-mechanically aligned on a laser optical bench to ensure that they are axially symmetrical in any configuration.
Easy collimation: With their precision manufactured mechanical parts and spherical secondary mirror, EdgeHD optics can be easily and accurately collimated so that the user can take advantage of the tremendous potential these instruments possess.
Technical Specifications:
Design: Schmidt-Cassegrain Aplanatic
Diameter: 235mm
Focal Length: 2350mm, f/10
Eyepieces: 23mm (102x) - 50.8mm Ø
Finder: 9x50mm
Zenithal: 50.8mm Ø
Dovetail: type Losmandy (CGEM, CGE PRO)
Coating: StarBright XLT®
Weight: 9.53kg
Optical Tube Celestron Edge HD 925 XLT 235mm Ø 91040-XLT
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