The slide duplicator is suitable for copying, transferring or digitising 35 mm slides with a 50 x 50 mm slide frame and also 35mm negatives using the film holder supplied.
Attachment to the camera is by 52 mm lens filter thread. You can use Step up/down Rings to accomplish this if your lens has a different filter thread.
This European version is suitable for KB slide frames with a frame thickness up to 3 mm (type A, GEPE and similar).
The resolution of a modern DSLR is far greater than any 35mm negative scanner.