Quoting "mike.wilson" <[EMAIL PROTECTED]>: > I did wonder about beam-breaking apparatus for triggering the shutter > but I think the large opening will be a problem again. > > For both, it will be dark(ish) and probably some form of light > enhancement (i.e. night vision scope - flash is not desireable) will be > needed.
Mike, I think there are only two options; the IR alternative that Cotty wrote about, and some solution that involves flash. I agree with you that flash can produce very unpleasant lighting, but a pair of slave flashes and white reflectors can light the barn opening and still leave the background entirely dark. That may be a neat way of doing it. For motion sensors, I suspect that the type used for burglar alarms will have a sufficient AOV to detect motion in the whole barn-door opening. This solution would require that you have a camera/flash trigger developed, though. I don't know how easy that is. A friend of mine has had a box built to control a Nikon D100, but I can't recall neither price nor construction challenges...:-( Jostein ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
