I wanted to see what the result would be of a pinhole camera that had an actual mechanically operated shutter. The simplest way I could think of for trying this was to convert a regular 35mm SLR camera into a pinhole camera. To do this I bought a body cap off of eBay and drilled out a hole in the centre. Over this hole I securely taped one of the Reality So Subtle brass pinhole discs. Coincidently the focal length of this conversion, the distance between the film plane and the pinhole was again 50mm so I could use a 0.3mm pinhole again.
The 50mm was measured as accurately as I could but I cant say for sure it was dead on. Even with a vernier calliper it could have been one or two mm out.
I taped over the viewfinder and the old battery chamber to make sure no stray light could get in and the body cap screws in to no light should be able to get past this. I added a shutter release cable that could be locked off to allow for long exposures without holding down the button on the camera and can use it in bulb mode for an exposure as long as required. The frame spacing should be as accurate as it would be when using it conventionally with a lens. The pinhole adaptation should make no difference to this.