ZWO is well known for their wide selection of astronomy CMOS cameras, from smaller planetary cameras that also work great as a guider to professional quality full frame cameras - available with either built-in color filter wheels or stand-alone filter wheels for all the popular imaging filter sizes.
ZWO also makes some of the most popular imaging accessories on the market today, including the ASIAIR Plus, the AM5N harmonic drive equatorial mount, and their own line of APO refractors!