The Starizona Filter Slider is unique by being perfectly circular with no handles or other protrusions that could interfere with the light path. The body of the filter slider is small enough in diameter that it adds no significant obstruction to the telescope.
The filter holder slides easily in and out of the filter slider body, making it simple to change filters in the middle of an imaging session. Each holder uses small but powerful magnets to lock in place against matching magnets in the main body. The magnets are strong enough to prevent any slipping but allow for easy removal of the holder when it’s time to change filters.
This is used with the OSC camera so that filter changes can be done quickly without removing anything from the optical train.