Originally Posted by d*d

okay, its getting a little off thread now - but I can see I've opened a new can of worms with the offhand reflection into infinty remark, but whislt the above is true you can setup a feedback loop in a variety of different ways which will not have the subject interfering with it. draw a circle on a bit of acetate, connect a tv up to a video camera and film the tv through the acetate- voila - instant infinity