Hi Paul,
I'm getting mixed up with your CMOS camera model.
You say it's a ASI1600MM-C. Which is a mono, cooled CMOS camera.
There is one here that I can find:
https://www.astroshop.eu/astronomica...3-mono/p,50241
but it's no longer stocked.
It looks like it's been superseded by this one:
https://optcorp.com/products/zwo-asi1600mm-pro-cooled
that's the ZWO ASI1600MM Pro.
It says the
DDR memory buffer is the main difference between ASI “Cool” and “Pro” cameras.
DDR Memory Buffer
The ASI1600MM Pro camera includes a 256MB DDR3 memory buffer to help improve data transfer reliability.
The use of this memory buffer minimizes amp-glow, which is caused by the slow USB 2.0 transfer speeds.
OK - so is the problem caused by not having that latest feature?