Connect any CS mount lens to your QHY5-II series cameras. An application suggestion is to convert your QHY5-II planetary camera into a all sky camera with a fish-eye lens or electronic viewfinder for remote robotic application with 8mm f/1.0 large aperture lens. 

This adapter replaces the original C mount adapter on your QHY5-II series camera. 

Select IR filter for colour camera (QHY5P-II-C / QHY5L-II-C) and AR filter for mono camera (QHY5L-II-M / QHY5-II-M).