All,

Have just done making some measurements of my ART285 (it's cloudy, so
might as well do this!).

The full Excel file documenting the test is in the Files section.

Results:

Gain = 0.57 e/ADU
Noise = 5.6 e

Dark count = 0.0015 e/s (very good!)
Well Depth = 28500 e
Dynamic Range = 5080 levels, or 12+ bits.

A couple of things to note :- noise is very good, but linearity looks
poor, with up to approx 10% deviation from linear.

However, could this is due to poor shutter time accuracy? Almost
certainly there is something happening here at the 1.1 to 1.2s
interval - see the chart at the bottom. This gap turned up a few
times in the test, accompanied by a gradient in the image sub-frame at
shorter exposures than 1.2s.

Anyone care to comment?

TG