Unlike most other telescope designs, these scopes can easily be converted to a variety of focal ratios for different photographic applications for both narrow- and wide-field imaging.
Cassegrains are a catadiotric telescope which incorporates both lenses and mirrors.  Light is 'folded' to provide a long focal length in a very compact tube, making them very versatile and portable. Unlike most other telescope designs, these scopes can easily be converted to a variety of focal ratios for different photographic applications for both narrow- and wide-field imaging.