Introducing Celestron s EdgeHD Optical System
See the Universe in HD EdgeHD is an Aplanatic Schmidt telescope designed to produce aberration free images across a wide visual and photographic field of view. 11094_cge_pro_1400HD.jpg The optical system was designed to reduce more than just off axis coma, but also to give an astrograph quality flat focal plane all the way to the edge of the field of view. M81 and M82 Photographed By: Andre Paquette
EdgeHD Features
True Astrograph Quality Many optical designs that advertise themselves as "astrograph" quality actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for visual observing, stars will appear out of focus at the edge when used with a flat sensor of a digital camera. A curved focal plane does not perfectly coincide with a flat CCD chip and therefore will appear out of focus at the edges. EdgeHD optics produce a focal plane more than three times flatter than a standard Schmidt Cassegrain telescope and dramatically flatter than other competing coma free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today.
How Flat is Flat? Curvature of Field for 14" EdgeHD (using 42mm chip) 200 microns Diffraction Limited Depth of Focus for 14" EdgeHD 300 microns
Astrograph quality flat field. Celestron EdgeHD focused on axis, focuses sharply across the entire FOV
Competing Coma Free Schmidt design focused on axis, shows sharp stars in the center of the image, but dramatically out of focus stars (donuts) at the edges. This indicates a strongly curved focal plane
Improved Resolution Superior edge performance not only creates rounder, more pleasing stars but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. Celestron's High Definition optics let you resolve smaller spot sizes all the way to outer edge, revealing finer detail and greater contrast.
Brighter Images EdgeHD optics give you smaller (more concentrated) stars that create brighter images and allow you to see down to a fainter magnitude than other equally sized telescopes. Poor edge quality can spread out starlight so much that the brightness of a star appears the same as the sky background, making it undetectable to your eye (or camera). With EdgeHD optics you will be able to capture the faintest of galaxies all the way to the corner of your full frame camera chip.
Maximum Versatility Telescope Model f/2 Configuration F/7* Reducer Lens Standard f/10 Configuration F/20 with Barlow lens 8" 406mm (16") 1422mm (56 ) 2032mm (80") 4064mm (160 ) 9.25" 470mm (18.5") 1645mm (65 ) 2350mm (93") 4700mm (185 ) FOCAL LENGTH & SPEED 11" 560mm (22") 1960mm (77 ) 2800mm (110") 5600mm ( 220 ) 14" 711mm (28") 2488mm (98 ) 3910mm (154") 7820mm (307 ) * Focal Ratio of reducer lens still pending.
Field of View Telescope Model f/2 Configuration F/7* Reducer Lens Standard f/10 Configuration F/20 with Barlow lens 14" 711mm (28") 2488mm (98 ) 3910mm (154") 7820mm (307 ) FOV 3.4 degrees 1 degree.6 degrees.3 degrees
EdgeHD 11, CGE Pro Mount, Apogee U16M camera
IC1318 in Cygnus taken with Edge HD 11 on CGE Pro mount and Apogee U16M camera. Taken by Andre Paquette
M13 & NGC 6207 taken with Edge HD 11 on CGE Pro mount and Apogee U16M camera. Taken by Andre Paquette
Leo Trio taken with Edge HD 8 on CGE Pro mount and Apogee U16M camera Taken by Andre Paquette
Coma Cluster taken with Edge HD 11 on CGE Pro mount and Apogee U16M camera Taken by Andre Paquette
M63 taken with Edge HD 8 on CGE Pro mount and Apogee U16M camera Taken by Andre Paquette
M81 & M82 taken with Edge HD 8 on CGE Pro mount and Apogee U16M. Apogee 16 has a 52mm diagonal chip representing an almost 1.5 Deg FOV. Taken by Andre Paquette
CGE Pro HD 1100 with Hyperstar Lens Assembly and Canon 5D DSLR
North American Nebula (NGC7000) taken with EdgeHD 11 and Hyperstar f/2 lens Taken by Jason Fournier
F/20 and beyond C14 Sean Walker C14 Damian Peach C9.25 Damian Peach C11 Jason Fournier
Mechanical Features Mirror Support Flexible tension clutches hold the mirror in place and reduce image shift when rotating the tube around the mount. Tube Vents Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 60 micron micro mesh filter guaranteed to let warm air out without letting dust in. Fastar Versatility All EdgeHD optical tubes are Fastar compatible for imaging down to f/2 with optional accessories. Easy Collimation With precision machined mechanics and a spherical secondary mirror, EdgeHD optics can be collimated accurately and easily to guarantee that they perform to their potential every time you use them.
Cut away view of EdgeHD Mirror Clutch System
60 micron vents Magnified to 400x
EdgeHD 9.25, 11 & 14 Optimal Back Focus Distance
Celestron Support
11093_cge_pro_1100HD.jpg 11094_cge_pro_1400HD.jpg CGE Pro HD Series CGE Pro HD General Features EdgeHD Optics Premium StarBright XLT coatings 9x50 Finderscope Premium 2 82 Axiom eyepiece included 2 Star Diagonal CGE Pro Computerized Mount General Features High Payload Capacity All Star Polar Alignment No tool Polar Alignment Permanent Periodic Error Correction Meridian Tracking Faster Slew Speed Accurate and very guideable tracking CGE Pro HD is available in 9.25, 11 and 14 Optical Tubes
Telescopes, Eyepieces, and Astrocameras, by Richard Berry
Quality you can see, by a name you can Trust
11082_cgem_1100HD.jpg 11080_cgem_800HD.jpg CGEM HD Series CGEM HD General Features EdgeHD Optics Premium StarBright XLT coatings 9x50 Finderscope Star Diagonal CGEM Computerized Mount General Features All Star Polar Alignment Easy adjustment for polar alignment Permanent Periodic Error Correction Meridian Tracking Internal RA and DEC Motor Wiring CGEM HD is available in 8, 9.25 and 11 Optical Tubes
Moon taken with Edge HD 11 on CGE Pro mount and Apogee U16M camera. Cropped Taken by Andre Paquette
M42 taken with Edge HD 11 on CGEM mount and Canon 5D DSLR Taken by J Fournier
M65 & M66 taken with Edge HD 8 on CGE mount and Canon 20D camera. Taken by Frank Freestar8