On 18/11/2019 22:33, T i m wrote:

I believe some here have mentioned the NiteDevil range but reading
around seems to suggest that these sort of low light cameras (as
opposed to high-end / military I suspect) achieve such with fairly
long shutter times and so are prone to blurring / smearing on any
moving objects?

The shutter speed is limited by the frame rate. These cameras store
successive frames then combine them. It's adjustable (everything on
NightDevils is adjustable) so you can get optimum setting for your
application. The most extreme setting gives still pictures in near total
darkness that look like day, but anything moving faster than a council
workman looks like a ghostly apparition!

Look at
https://www.donvalley.tv/cctv
especially the picture captioned 'Although this shot appears to be well
lit its actually quite dark out there!'
That isn't an example of real extreme low light, but if you went out
there you'd find it very dark.

Bill