The optical quality and spot size across the entire image circle is unprecedented for an astrograph in this price range-or even that of a much more expensive instrument.
CELESTRON RASA 8 INCH FREE
The Rowe-Ackermann Schmidt Astrograph features newly designed optics with 4-element rare-earth glass for images free of false colour and aberrations like coma and field curvature. Combine this large image circle with a focal length of just 620 mm and you have an instrument suitable for wide-field imaging, creating huge mosaics of the night sky, surveying, and even comet hunting.
CELESTRON RASA 8 INCH FULL
Today, with CCD sensor sizes as large as film-or larger-the Schmidt Astrograph offers a full 52 mm optimised image circle to capture pinpoint stars on the largest imaging chips. The Rowe-Ackermann Schmidt Astrograph builds on the legacy of Celestron’s Schmidt Camera, which allowed astrophotographers to produce images on film in the 1970s. That means you’ll create better-looking astroimages in a fraction of the time. Because shorter exposure times are possible, your equatorial mount won’t need to accurately track over extended periods. This fast, wide-field f/2.2 system offers two advantages over traditional f/10 astroimaging: better apparent tracking and shorter exposures. The NEW Celestron astrograph telescope features 11" f /2.2 Rowe-Ackermann Schmidt optics and rare-earth glass for images free from false colour, coma and field curvature.ĥ2 mm imaging circle ensures pinpoint stars to the edges of the largest imaging sensors.Ĭustom engineered linear brass focuser bearing reduces image shift and provides precise, smooth focussing.īuilt-in, quiet, high-output 12v MagLev fan to reduce cooldown time and block dust.Ĭelestron’s new Rowe-Ackermann Schmidt Astrograph, the perfect companion to today’s top DSLR or astronomical CCD cameras.
The four-element lens group in the centre of the corrector really did its job well the quality of the field was quite superb." Pete Lawrence writing for BBC Sky at Night magazine.
The start were sharp across the entire field and showed no serious distortion right to the frame corners. The larger aperture of the RASA really delivered a tremendous improvement in resolution. The billowing nebula had lots of fine structure in it and this was even more impressive when we compared the shot with a similar field taken by a 4-inch apochromatic refractor.
CELESTRON RASA 8 INCH ISO
We found our images went deep very quickly, a five-second test at ISO 1600 showing a tremendous amount of detail in and around the Orion Nebula, M42. Using a DSLR with an APS-C sensor, the scope gave us a measured field of view of 1.6x2 degrees. "The Astrograph’s performance was extremely good. Part Number: 91076-CGL NEW upgraded v2 model with improved Ultra-Stable Focus System (USFS) to reduce focus shift and mirror flop.
0 kommentar(er)
