I saw something online about someone making a fisheye lens out of a camera film canister and a peep hole. I haven't had a film canister in forever so I used a bottle lid. It fit better on my camera anyway.
1
Get a cap that's big enough to fit around the lense of your camera.
2
Drill a hole in the middle using a bit that's the same size as the peephole you're going to use. Don't go too big!
3
Clean up the edges with a chisel if you need to.
4
Measure around the inside of your cap and cut out some foam strips to place inside so the cap fits snug on your camera.
5
I didn't glue mine in place or anything, but you definitely could. It might be a good idea at this point to paint the inside of your cap black so it's nice and dark when you look through your camera. I didn't and there's a bit of a blue ring around the edge where the light kinda goes through the plastic.
6
There's a casing that the peephole screws into that you'll need to take off.<BR>Screw your peephole into the cap, but make sure not to go too far in that you touch the lens on your camera.
7
Stick it on your camera, adjust, and that's it.<BR><BR>Here's my hallway...
8
This is the same camera position, but with the fisheye.