"Steve Firth" wrote in message
...
Sarah wrote:

A bit out of my depth here so advice welcomed.

You need a decent camera. Most webcams and CCTV cameras are inadequate
beceause they tend to be quarter frame VGA (320x240) which is inadequate
for evidence. You really need broadcast quality cameras and low
compression images in order to identify who is doing what and to what.
Look for a camera and a recorder that can at the very least cope with
full frame VGA - for CCTV this is 672x544. There are some recorders
around that can do it, but the majority of DIY shed cheapies just offer
336x272 or sometimes "VGA" at 672x272 which is inadequate.


Shouldn't that be...the scan lines rather than the image size? ie 420 lines
will give a poor image as opposed to 625 lines will give you TV quality