Celestron RASA 8 8-Inch Rowe-Ackermann Schmidt AstrographCapture spectacular wide field deep sky images in seconds with Celestron 8 Inch Rowe Ackermann Schmidt Astrograph (RASA 8). This incredibly fast f 2. 0 system is the perfect companion to todays color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. Thanks to its fast focal ratio and patented optical design, you can produce sharp, detailed images and, in many cases, skip the autoguider completely. Weighing in at just 17 pounds,