How to make a cheap fisheye lens for a compact digital camera.
You will need:
(1) Your digital camera - I used a Canon Ixus 65
(2) An old or broken SLR zoom lens - I picked up a Sigma 28-200mm from the broken lenses box of a camera shop for 5 quid, I think the autofocus didn't work.
(3) some really tiny screwdrivers, these SLR lenses are held together with tiny screws
(4) Luck - plenty of it
(5) Black electrical tape, various tubes, superglue, elastic bands, anything else you can think of to make a mount for the lens.
Step 1: Take the Lens Apart
Take the SLR lens apart using all the tools you can muster, you will probably need some very tiny screwdrivers.
You are after the lens element that sits just behind the front lens element. Keep all the other bits for other projects.