{"id":30071,"date":"2025-10-04T11:53:37","date_gmt":"2025-10-04T09:53:37","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=30071"},"modified":"2026-03-04T20:39:21","modified_gmt":"2026-03-04T19:39:21","slug":"celestron-rasa-800-203-400-astrograph-cgem-ii-goto","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/celestron-rasa-800-203-400-astrograph-cgem-ii-goto\/","title":{"rendered":"Celestron RASA 800 203\/400 Astrograph CGEM II GoTo"},"content":{"rendered":"

The Celestron Telescope Astrograph S 203\/400 RASA 800 CGEM II GoTo<\/strong> is an advanced astrograph for high-level deep-sky photography. The Rowe-Ackermann Schmidt Astrograph (RASA).<\/strong> Combines a 203 mm aperture with an extremely short focal length of 400 mm (f\/2)<\/strong>, giving you sharp, in-depth shots of nebulae, star fields and galaxies in minutes. Combined with the CGEM II mount<\/strong> this system constitutes a powerful and fully automated setup for serious astrophotographers.<\/p>\n\n\n\n

The RASA optics<\/strong> is specifically designed for modern CMOS, CCD and DSLR cameras. Thanks to the f\/2 system, the luminosity is 25 times greater than in a classic f\/10 Schmidt-Cassegrain. This means: shorter exposure times, less noise and more detail. The optical correction ensures razor-sharp, round stars right to the edges of large sensors - without the need for a separate field flare or corrector.<\/p>\n\n\n\n

The front-focused design places the camera at the front of the telescope, keeping the optical path short and distributing the balance perfectly across the mount. The optics feature StarBright XLT coating<\/strong> for maximum transmission and contrast. The internal fan reduces cooling time, which is important during nighttime temperature changes.<\/p>\n\n\n\n

The CGEM II mount<\/strong> is the robust heart of this setup. With a carrying capacity of 18 kg<\/strong> it provides ample stability for the RASA 8 and heavy cameras. The mount features Permanent Periodic Error Correction (PPEC).<\/strong> for accurate tracking, and thanks to All-Star Polar Alignment<\/em> you can quickly and precisely align without a polar finder. The wide mounting base and steel legs (51 mm) ensure absolute stability even in long exposures or wind.<\/p>\n\n\n\n

The NexStar+ hand controller<\/strong> with 40,000 objects makes manual control and tracking easy. For maximum control, you can pair the telescope with Celestron CPWI<\/strong>-software or through the SkyPortal WiFi module<\/strong> control with tablet or laptop. The CGEM II can also track objects smoothly beyond the meridian without re-alignment - ideal for nights when you are collecting data nonstop.<\/p>\n\n\n\n

The Celestron RASA 800 CGEM II<\/strong> is made for those who don't want to wait for results: pure speed, precision and simplicity for professional astrophotography.<\/p>\n\n\n\n

What you can photograph with it:<\/p>\n\n\n\n