Re: CCTV cameras

["shady" <sh@xxxxxx>]

"Bob La Londe" wrote...
>
> That's no surprise.  Most cheap cameras with IR LEDs rate the viewing
> distance misleadingly.  When they say 30 foot range for instance they mean
> against a highly IR reflective surface such as a sheet of glossy white
> sign board.  Means nothing in the real world.  They seem to work better in
> general indoors in rooms with dimensions smaller than their rated range.
> Outdoors not so much.  Heck, most better quality cameras with IR
> illuminators don't produce a usable image at more than half their rated
> distance.
>

isn't there something about the color green absorbing ir instead of
reflecting it too?

not very useful when looking at grass and trees