Starizona Hyperstar is a device sold by Starizona to convert a slow f/10 Schmidt Cassegrain telescope into a super fast F/2 camera lens. The idea always seemed appealing to me since I have a Celestron EdgeHD 11 inch Schmidt Cassegrain to use it on. Some years ago I bought a Starizona Hyperstar device, but sadly it has been rarely used since I bought it. Several of the problems with it are that it is difficult to get into perfect focus, and collimating is difficult.
In the last year my interest in using this device has been enhanced by exposure to the fine results that others are getting with Hyperstar, particularly in the realm of narrowband imaging. Narrowband imaging requires hours and hours of long exposures since the light that reaches the camera just trickles in a photon at a time. With Hyperstar, that imaging time can be cut down substantially.
One of the weaknesses is that stars just seem to work better with refractors. If there was a way to combine the nebulosity of narrowband from the Hyperstar with RGB stars from a refractor, then the combined image could be acquired in a more efficient way. Today’s wonderful software allows you to do just that.
Below is the field of view of a Takahashi FSQ 106 refractor compared with a Celestron 11 inch Hyperstar equipped Schmidt Cassegrain. Both are equipped with a ZWO ASI 1600MM camera. The similar fields of view make it much easier to combine images. With this in mind, I have been upgrading my Hyperstar setup to engage in this type of imaging.
Below is a link to an image that was acquired and processed by a top imager at Astrobin using these techniques. It looks pretty magnificent to me, so I guess I will give it a try.