Quote Originally Posted by narsuitus
The Nikon AM-1 cassettes I use in my F2 can be used indefinitely because they do not have the felt-lined slit that conventional cassettes use.
I just did an eBay search and found two up for auction. Am I correct in interpreting the photo that they've got a two-part outer wall with an opening that forms a "door" when they're appropriately rotated, and that this rotation must be done by the camera, so they'll only work in certain cameras?