about a year ago I took a spare body cap and drilled a hole in it, then used foil/electrical tape and experimented with different sized holes and ended up with some neat pic's. It was a lot cheaper than 45 bucks. I did this with a Pentax digital SLR which was nice because I got immediate feedback on the effect I got with different sized holes and shutter speeds. I misplaced that particular body cap earlier this year, but it can be made form any body cap as long as it's designed for your particular lens mount, It's cheap fun.
Edit: Since this is an analog forum, I used the digital with my homemade body cap to get approximate hole size/shutter speeds at different iso values so I could use them as a starting point on my Pentax film pinhole photography (wink, wink).
Last edited by average-guy; 12-19-2011 at 02:38 PM. Click to view previous post history.
Reason: Add extra info