works for canon or nikon
basically just a body cap designed to fit your diana lens (twist in)
always wanted to try the holga lens adaptor for canon from holgamods.com but i'm probably going try the lomo one since i have the diana f+ and always wanted to get more lens for it
but i might still try to make my own holga lens adaptor after buying a holga lens and a lens cap. doesn't seem too hard to make