120mm pinhole camera

<p>I'm making a pinhole camera out of wood for my college class. I'm worried that my film advance knobs will leak light through and I can't quite wrap my head around what to do or how to construct them so that this can be avoided. Any detailed advice about this would be great. I'm really struggling and don't have a lot of time left to figure it out.</p>

<p>I would think that if everything is black, and the knobs are larger than than the posts, and butt up to the camera body, you probably won't have a problem. But I've never built this kind of pinhole camera! If it turned out to be a problem, and you don't have time but still need some images, you could keep the camera in a black bag with a hole for the lens to peek out.</p>

<p>There must be some plans for pinhole cameras out there....</p>

<p>Go to a craft store and buy some felt. Its about 65 cents for an 8x10 sheet. When i made my camera project i used a bolt for the film advance with the tip ground flat to be the key that fit into the 120 spool slot. Then I used an oversize decorative Bolt /Nut cap for the knob outside (found it in the hardware store in the draws for lamp parts). Then I cut a piece of felt to go between it and the body, around the outside of the shaft hole, and on the inside the same thing with felt on the inside of the body around where the shaft hole enters the body (fabric glue to hold it in place). Then a washer over that . the washer was for a bolt one size smaller that i had drilled and taped to screw onto the bolt exactly and i used a little epoxy on the bottom threads to keep it from moving later.</p>

<p>Buy 2 washers and place them inside where the knobs sit. Everything inside the camera should be black, including the washers, so reflections will not happen. For more info check out www.f295.org which (in my humble opinion) is the best pinhole website in the world. And then have fun being a pinholer.</p>

<p>Another good idea besides felt is black craft foam, available in thin sheets from hobby places like Hobby Lobby in the states. Cut two washers of this material, placed on the wind knob shafts on both the inside and outside. You can also glue some of this material to a wide metal fender washer, works better than just painting the washer black.<br>

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~Joe</p>