with equatorial Goto Mount
Schmidt-Cassegrain and EdgeHD telescopes on equatorial GoTo mounts combine compact optics with automatic object locating and accurate tracking. This category features Celestron EdgeHD kits with CGX mounts and 8, 9.25 or 11 inches of aperture—for detailed views of the Moon and planets, deep-sky observing and astrophotography.
EdgeHD telescopes with equatorial GoTo mounts
The kits in this category pair Celestron EdgeHD optics with the computerised CGX equatorial mount. The Schmidt-Cassegrain design folds a long optical path into a compact tube. The resulting focal lengths are 2,032 mm (8 inches), 2,350 mm (9.25 inches) and 2,800 mm (11 inches); all three versions have a focal ratio of f/10.
EdgeHD optics are designed to deliver a corrected, flat field. This benefits visual observing and imaging, where stars should remain well formed toward the edge of the frame. Compatible EdgeHD tubes are also prepared for Fastar imaging at a shorter focal length. This requires suitable additional optics and imaging accessories, which are not automatically included.
How does an equatorial GoTo mount help?
An equatorial mount has a right-ascension axis aligned parallel to Earth’s axis. Once polar aligned, the mount can compensate for the sky’s apparent daily motion by tracking around that axis. This supports steady tracking at high magnification and avoids the field rotation associated with alt-azimuth mounts during longer deep-sky exposures. GoTo control helps locate stored celestial targets, although careful setup and alignment are still essential.
Compared with an alt-azimuth mount, an equatorial system takes more time to set up: the tripod and mount need a stable base, the polar axis must be aligned with the celestial pole, and the telescope must be balanced with counterweights. Consider the space required and the total weight as well. This design is especially appealing for a permanent setup or more demanding observing and imaging.
Which aperture suits your plans?
- 8 inches (203 mm): The more manageable entry point to the EdgeHD range. It reveals lunar and planetary detail and brings many star clusters, nebulae and galaxies within reach.
- 9.25 inches (235 mm): A balanced middle option with greater light gathering and resolution. Choose it if you want more visual capability and are comfortable planning for its size and weight.
- 11 inches (280 mm): The largest aperture in this category, offering higher theoretical resolution and more light for faint targets. The tube and mount require more storage space and are more demanding to transport.
Actual image quality also depends on atmospheric seeing, thermal acclimation, collimation and observing conditions. A larger aperture can show its full potential when the atmosphere is steady and the telescope has cooled to ambient temperature.
What should you consider before choosing?
Start by deciding whether your priority is visual observing, planetary imaging or deep-sky astrophotography. For visual use, ease of transport, a stable observing site and suitable eyepieces matter. Imaging also requires a camera, compatible image format, guiding, power and careful polar alignment. Check the details for each kit, as supplied eyepieces and finders may vary between versions.
If you prefer a quick and straightforward setup, an alt-azimuth GoTo mount may be more convenient. If accurate tracking and avoiding field rotation during longer exposures are priorities, an equatorial kit is the better fit. Always check each product listing for its weight, dimensions and included accessories.