I'm hoping to set up a small studio for photographing small objects in a light tent, but would like to capture images from a digital camera via USB straight onto the computer, rather than onto a memory card (it's important that the pic is taken, and the database filled in with each photo). Does anyone have any experience with such as setup? I'm not sure which cameras support this. The Nikon Coolpix 4500 I have can support remote photography via USB (and image capture on OSX), but as soon as you plug in the USB lead, the viewfinder turns off so you can't see what you're taking..! Any advice gratefully received :-)