Use Your DSLR to Scan Old Negatives and Slides
If you've got a bundle of old negatives lying around, or a collection of slides sitting in your basement, you've probably been tempted to shell out for a service to scan them in for you. Luckily, if you've got a DSLR handy, you can do the digital conversion yourself.
This hack comes care of photographer Claus Thiim and it couldn't be simpler to execute. You'll need a 35mm slide mount, a 55mm polarizer without the glass, an old credit card and two rolls of toilet paper. Claus recommends gaffer's tape as well, though other types of tape will certainly work, if not as well.
If you've got boxes and boxes of film to convert, this strategy is probably going to be a lot more trouble than it's worth. For smaller projects though, like putting together a digital picture frame for a 50th wedding anniversary or your grandmother's 80th birthday, it's an inexpensive and simple way to go.