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The NexStar Evolution 8 HD is Celestron's 8-inch Schmidt-Cassegrain on the Evolution go-to mount, built around EdgeHD optics that correct coma and field curvature across the field. StarSense AutoAlign aligns the scope by itself, and built-in WiFi lets a phone or tablet run the whole session through the SkyPortal app with no hand controller. A rechargeable lithium-iron battery runs about 10 hours, and the Fastar-compatible secondary lets you image deep-sky objects at f/2 with a HyperStar lens. It suits observers who want serious aperture and imaging headroom in one portable package, and it costs more than a standard 8-inch SCT rig because of the EdgeHD optics and StarSense.
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Owners rate the Evolution 8 HD highly for its EdgeHD optics, self-aligning StarSense and cord-free WiFi operation. Common complaints center on weight, occasional WiFi dropouts and the extra cost of the EdgeHD and StarSense package.
The Celestron NexStar Evolution 8 HD is a Schmidt-Cassegrain telescope with 8-inch EdgeHD optics on a single fork arm mount. The EdgeHD system is flat-field and free of coma and field curvature. StarBright XLT optical coatings are used. It is made for both visual observing and astro-imaging.
The mount is fully motorized with computer go-to. It has manual release clutches and precision machined worm gears on both axes, including brass worm gears. It also has tray lighting, a USB charge port, and 4 auxiliary ports: 2 on top of the fork and 2 on the bottom. A rechargeable lithium-iron battery provides about 10 hours of continuous observing.
Built-in WiFi lets you control the telescope from a smartphone or tablet with the free SkyPortal app. StarSense AutoAlign aligns the telescope automatically when you tap "Connect and Align." For more precise pointing, you can enter up to 10 additional alignment points. The telescope is Fastar/HyperStar compatible for imaging at f/2. A StarSense hand control is included but is not required when using the app.
