This is a trick to take pinhole photos with a Bronica SQ-A by creating a pinhole and shutter assembly on an SQ body cap. We targeted Worldwide Pinhole Photography Day, April 29, 2007.

View the final results for WPPD 2007, WPPD 2008 and WPPD 2010

Fortunately we started early, Rev 1 definitely missed the mark a bit. But now we present Rev 2! A number of the existing parts were reworked to expand the bores of various apertures. The shutter itself had to be reworked for size and throw. Making lemonade out of lemons, we took advantage of this rework to make the shutter base plate a mirror image of the previous one. That permitted ditching the kludgey lever for tripping the camera shutter button (an operation necessary to make the camera think it took a picture, thereby allowing the film to advance).

Making a note for the future — it might be cool to replace the sunshade and clamping washer with a machined filter step-up ring. That would allow not only fitting a sunshade, but also filters. Although with the three stop filter factor of a 25A, one might need a lounge chair as part of ones gear. 8-)

The test pix below used the 0.014 inch (0.36 mm) f253 pinhole plate from the Rev 1 tests.

(Yes, technically, it is an SQ-A, but suffixing that with "hole" doesn't carry the right cachet.)

A CAUTIONARY NOTE! Recently, after a short round of pinhole and regular shots, we began having trouble with this SQ-A body using the regular lens. The shutter would only fire from the button and not from a cable release. It is not known whether "dry firing" without a lens coupled to the shutter mechanism can induce problems or not. Another body has been obtained that is working, but the idea of not using the SQ-Hole attachment on it seems wise.

So — anyone enamored of what was done here should consider themselves forewarned.