Imaging Source DMK 31AU03.AS Monochrome USB Astronomy Camera without IR Cut Filter, 1024x768 Pixel Resolution, C/CS Mount The Imaging Source DMK 31AU03.AS Monochrome USB Astronomy Camera - Software Bundle - The Imaging Source Warranty No Compression, No IR Cut Filter: The DMK 31AU03.AS does not compress the video stream it outputs - the video data that is captured by the CCD chip is outputted directly by the USB connector. Similarly, the camera does not have an IR cut filter, a color filter, nor an other kind of electronic filter High Speed Data Transfer Via USB: In order to transfer the vast amount of data created by the stream of uncompressed and lossless monochrome images to the host PC, you need a very high speed bus. Hence, the DMK 31AU03.AS is fitted with a fast USB connector