Global-shutter sensors can be often in small and lightweight cameras intended for automatic guiding and for Sun, Moon, and planetary imaging with short exposures. These applications benefit from the global-shutter sensor ability to start and end the exposure of all image pixels in the very same instance of time, which prevents image distortions of rapidly changing scenes (such rapid changes include also seeing-affected images).

When the exposure is finished, the whole image is typically digitized and immediately transferred to a host PC. However, time nonuniformity of the transfer leads to nonuniformities in the image. What is more, the necessity of the immediate transfer limits the camera operating modes. Luckily, both issues can be remedied by taking a page from a rolling-shutter book and include a large onboard memory capable of storing multiple full-resolution images. While these cameras require slightly more sophisticated electronics, they offer significantly better results.

We are introducing a new R-series of cooled C2 cameras, which combine global-shutter sensors and onboard memory; all packed in the usual high-quality body with regulated sensor cooling, mechanical shutter, filter wheel, and a wide range of telescope adapters.