Arthur, I dont sell these camera's so i have no resson to sling mud
. I am just pointing out the specifications and price differences. And I leave it to the people who own them to show what has been done with them. I dont own any so I can only report what I have read.
I do have a personal interest in wanting to see more affordable camera.
The QHY6 uses a sony CCD with resolution equivalent to the DSI II camera's.
http://qhyccd.com/ccdbbs/index.php?topic=41.0
I made an error before the QHY2 is higher resolution than the DSI II Pro and is slightly less expensive.
Regards