Did you ever notice how many of the later film stocks were automatically registered by your camera as to what speed and how many exposures were available amoung other things. Well, this is due to a coding on the film introduced by Kodak, called DX.
I can't decide whether or not I like Tony and Chelsea. But, every once in a while, they put out a videu I do like and feel like sharing. This isn't thier latest video. But I think it's worth watching.