This is a good quality slide and negative copy system, originally designed for video cameras, but suitable for use with nearly any camera. It screws onto the front of your lens- it includes adapters for 46mm, 49mm, 52mm, 55mm, and 58mm threads- and includes a built-in close up diopter. That's all well and good, but there's more: it also includes a correction filter to help your camera deal with the orange base of colour negative film. And in addition to the usual 35mm slide and negative holders, this is the only copier we've ever seen that also includes a holder for 110 film. For best results with 35mm film, we recommend a lens with a focal length of between 70 and 100mm (full frame equivalent.) In excellent condition.