The ST-9E is currently our only active imager. A five-slot filter wheel allows the use of any 1.25" filter, though it normally contains the Clear, Red, Green, Blue, and I-band filters. The ST-9E includes a second chip that can be used for autoguiding with the C-14. The equipment list in Starry Night Pro includes a map of the camera's focal plane, so that you can plan where to place the guide chip.
The listed specs are for the ST-9E's default operating mode. The CCD also supports on-chip binning in 2×2 or 3×3 modes. Binning gives faster readouts at the cost of resolution. (It also reduces read noise, but most observations from Pasadena are background-limited so this doesn't matter.)