Hyperstar 9.25 v4 High Definition with Filter Slider
The HyperStar 9.25 lens converts a standard Celestron 9.25" SCT from f/10 to f/2.2, making the system 25 times faster. That means 25-times shorter exposures! Now you can capture deep-sky images without guiding and without an equatorial wedge (in alt-az configuration). The HyperStar lens shortens the focal length of the telescope, giving a much wider field of view, and giving a greater tolerance of tracking errors, allowing for unguided, alt-az imaging.
The HyperStar 9.25 is compatible with a variety of cameras, including CCD, CMOS and DSLRs. The HyperStar 9.25 covers up to a 28mm sensor size. Separate adapters are required for different cameras. One adapter is included with the HyperStar lens.
Optical performance is excellent, with a coma-free, flat field of view up to 3 degrees wide.