Here is a summary on the performance of the new CFH12K focal plane. First of all, we now have a great 12K by 8K mosaic. QE, CTE and cosmetic look great and the camera is still as fast as it was.
Image quality is good over the whole field.
Residual images from saturated objects still remains an issue for some CCDs when using narrow band filters. It was a 37 Gb night and a 11 Gb lab data collection. The bias level in the image area is uniform and equal to the overscan level. A simple overscan level correction will correct for the bias level. It may be better to mask them as bad areas.