Celestron Telescope RASA CGEM II 800 f/2.0 White

Celestron Telescope RASA CGEM II 800 f/2.0 White. Simply add a camera and this package offers everything you need to take spectacular images of wide-field deep sky objects. RASA Performance Made for Everyone Capture spectacular wide-field deep sky images in seconds with Celestrons new portable astrograph the 8 Rowe-Ackermann Schmidt Astrograph (RASA). 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 its easy to transport your 8 RASA to the most remote dark sky locations. The 8 RASA is an imaging telescope that delivers a flat field without optical aberrations for razor sharp stars across a wide field of view. It can capture stunning deep-sky astronomical images without the challenges typically presented by longer focal length instruments at a fraction of the cost of those systems. The latest addition to the RASA family this 8 version is a much more portable and affordable version of the heralded RASA 11 which was introduced to much acclaim in 2014. With the 8 RASA joining the lineup a wider range of astroimagers can enjoy the benefits of the RASA design. It has many of the same thoughtfully designed features as its big brother RASA 11 including the integrated air-cooling system internal filter mount and sturdy CGE dovetail mounting bar. Purely designed for imaging the 8 RASA cannot be used visually. The prime focus focal plane is located at the front of the optical system so it cannot accommodate a traditional eyepiece. Shorter Exposure Times and Virtual Real-Time Observing Since it is an F/2.0 optical system imagers can use shorter exposure times to capture detail in faint objects. When combined with sensitive cameras and the proper live stacking software the 8 RASA can provide an almost real-time observing experience. View images on a computer instantly that are brighter and more detailed than can be seen in much bigger telescopes with the naked eye. Ultra-Stable Focus System With the launch of the 8 RASA Celestron is unveiling a new focuser design that mitigates lateral movement of the primary mirror when focusing slewing or tracking with the astrograph. Focusing is easier more accurate and more stable than ever. The key to the Ultra-Stable Focus System is two sets of precision bearings that are precisely aligned and tested during assembly to ensure optimal results. Built for Todays Latest Cameras Unlike the larger RASAs that work with DSLR and large CCD cameras the 8 model was designed with color astronomical CMOS cameras smaller CCD cameras and mirrorless cameras in mind. It is optimized for sensors with up to a 22mm diagonal but still performs well with larger (up to 32mm diagonal) sensors. As such it works well with APS-C sized sensors used in many mirrorless cameras. Camera adapters to connect C-mount cameras and cameras that mount with M42 threads are included. Celestron offers optional adapters to connect your 8 RASA to Sony or Canon mirrorless cameras. Unique Optical Design RASAs optical design is patented (US 2016/0299331 A1). The design consists of a Schmidt corrector primary mirror lens group and optical window. The lens group contains 4 elements and utilizes rare-earth elements. Unlike many telescopes that only perform well over the visible spectrum (400-700nm) the 8 RASAs optics are designed to perform over a wider spectral range from 390-800nm. This allows more of the light emitted from the astronomical object to be sharply focused in the image. With many imaging systems adding an extra piece of flat glass such as a filter does not change optical performance. However that is not the case with super-fast optical systems like the RASA. Our engineers addressed this by designing the RASA with a removeable optical window so you can maintain peak optical performance if a filter is added or if a camera has its own optical window. Celestron offers a Light Pollution Imaging Filter designed specifically for the 8 RASA which mounts in place of the optical window. All refractive optical surfaces are coated with StarBright XLT coatings while the primary mirror uses enhanced aluminum coatings. This maintains high light transmission through the entire optical system. When compared with Hyperstar SCT systems the RASA 8 provides better optical performance and field illumination. CGEM II: An Excellent Platform for RASA CGEM II is a sturdy equatorial mount capable of rigidly supporting the 8 RASA. Its 40-lb. load capacity can handle the 17-lb. optical tube with ease leaving lots of capacity to spare for your camera and any accessories. The heavy-duty adjustable height tripod has 2 diameter steel tripod legs with graduated markings that make it easy to extend the legs to the same height. The 8 RASA connects directly to the CGEM II with its