One of the most popular software tools for planetary astrophotographers was just given a major upgrade. The free computer program RegiStax 4, by Cor Berrevoets, is better than ever thanks in part to contributions from an international group of planetary astrophotographers.
The most significant addition is the new multipoint alignment function, which allows users to register and stack multiple features across an image simultaneously. The tool is particularly useful for lunar and solar astrophotographers.
RegiStax 4 supports 8- and 16-bit-per-channel AVI movie files, BMP, FITS, JPEG, PNG, and TIFF still frames, as well as the new SER 16-bit-per-channel format movie stream generated by Heiko Wilkens's popular LucamRecorder camera control program for Lumenera cameras. The program also includes a downloadable PDF help file, explaining each function in detail.