Mirror clutches - Flexible tension clutches hold the mirror in place and reduce image shift when taking long exposure astro-images. Once focused the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly keeping the image centered in the eyepiece (or on the sensor).| 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 50-mesh filter guaranteed to let warm air out without letting dust in.| Fastar versatility - EdgeHD is the most versatile imaging telescope available today. At its native f/10 you can achieve the image scale necessary to capture the smallest of deep sky objects. Add the optional reducer lens—custom-designed for your size EdgeHD tube—and you can increase your field of view without sacrificing optical performance. A Barlow gives you added power for high-resolution planetary lunar and solar imaging. All EdgeHD optical tubes are Fastar-compatible allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f/2 wide field imaging.
Celestron's Ultimate 11" HD Optical tube with world class CGX Mount Computerized Tracking