I have a excellent Alta F47 (last version) with a new QHY 36mm 7 position filter wheel. The camera has a E2V 47-10 mid band ccd chip, +90% QE across the visual range. Main use is photometric research but I've used this chip to take nice astrophotography images as well using short subs. The bubble Nebula is a HOS stack of 30s ea with a total of 30mins each filter. Very low dark current unlike the deep depletion version. Chamber has been purged with argon and molecular sieve desiccant replaced. Camera cools to -25c from room temperature easily. I ordered a precise parts adapter to mate a new 36mm QHY FW to the camera, it works excellent with the added benefit of much less expensive filters as compared to using the Apogee 50mm unmounted FW. Comes with M54 dust cap , 2 and 3mm filter masks with power supply. During testing I noticed the CCD chamber window was dewing up, so I installed a Zwo anti dew heater on the shutter and ran the lead out the side accessory hole, I tested it and it works great. Comes with camera drivers installed on a usb stick.