That rocks Steve. I will get myself some kind of pinhole camera for this summer. I'd love to shoot some Medium Format black and white stuff using pin hole cameras.
You can probably do it with just your dslr. Take your (extra?) camera cap and make a hole (at center) in it, then take some tin foil and make it black with a marker. Apply the foil over the hole on the inside of the cap with the black side facing towards sensor. Finally, try and make the smallest hole you can in the foil, attach it to your dslr and have at it. I haven't tried it myself yet, though I'd like to. What makes the smallest hole in foil? Maybe you could find something thinner than foil (like parchment paper or something...)?
You can probably do it with just your dslr. Take your (extra?) camera cap and make a hole (at center) in it, then take some tin foil and make it black with a marker. Apply the foil over the hole on the inside of the cap with the black side facing towards sensor. Finally, try and make the smallest hole you can in the foil, attach it to your dslr and have at it. I haven't tried it myself yet, though I'd like to. What makes the smallest hole in foil? Maybe you could find something thinner than foil (like parchment paper or something...)?
The very best way to make the hole in the foil is to sandwich the foil between rigid layers of wood, plastic, etc., then drill thru with a 0.4mm drill bit at high speed.
Aluminum foil is one of the best materials for the pinhole, it's thin, light-proof, and drills very cleanly under the right conditions.
Im currently shooting a roll of film thru a cheap 35mm point and shoot that was converted to a pinhole ( not by me, picked it up on ebay )
I did build this pinhole camera out of an old Spartus TLR, it uses medium format film ( 120 ) My Spartus Pinhole Heres an image made with it Pinhole Pic
And as mentioned above, you can convert a DSLR bodycap into a pinhole. They do make premade ones, I see them on eBay quite frequently, but beware, even as small as the pinhole is, you can introduce dust onto your sensor.
Hell, you don't even have to make your own hole if you don't want to. They sell the pinhole caps at Adorama. I thought I remembered seeing pinhole caps at B&H as well but I can't seem to find it.
For the people that want to do it themselves here is a website with some info.
I have the Loreo lens in a cap. Only goes down to F64 though, but it has a piece of plastic as a lens. Keeps the dirt out in any case. Pretty fun little gadget, makes some nice halo induced images when wide open. :)