I finished off the new pinhole mount. (Thursday I had the first part of this pinhole rebuild.)

The actual pinhole is drilled in thin stainless steel. I attached it to the back side of the mount with Barge cement. The front side of the mount is already painted at this point.

I painted the inside with rattle can semi-gloss. The shiny spot isn't the pinhole.

I painted around the pinhole with black laquer (a Sharpie pen). The little dot in the middle is the pin hole. It's .0126" in diameter (.320mm).It's f/204.

The pinhole mount mounted in the camera, a medium format Mamiya Super 23 (2 1/4" x 3 1/4" negatives) with the rangefinder removed. Here the pinole is covered. I epoxied a little piece of wood onto the brass pinhole cover to make it easier to open and close.

The pinhole uncovered for making exposures.

The contraption on top of the camera is a Mamiya sport finder. $25 on eBay. I bought the sport finder for using this body as a street camera. I have some more bits coming in for the street camera project and I will write about using a medium format camera for street photography — if I don't hurt myself, or those around me, in the process. Sport finders are kind of cool. Really bright! The pinholes I've taken seem to be the same angle of view as a normal lens. I will do some testing, but I think I can use the sport finder to compose for the pinhole. It even has parallax compensation to 3 feet. Of course it's not going work for those really close objects. The grip isn't really used in shooting pinhole. For shooting, it needs to be on a tripod or sitting on something that isn't going to move. The grip is useful for carrying this tank around.

The paint is still drying in the inside of the mount. Tomorrow I'll make some test exposures. Then maybe I can get back to that fixed gear bicycle project. It's almost ready to paint.