I spoose I should have posted this in the projects/repair forum really, but all you can hear and see there is a tolling bell and some tumbleweeds blowing through ... so, for completeness, and much against my general principles of not talking about technicals, here we go:
It is made from 5mm black foam board. I found the Stanford pinhole instruction sheet, but found them only partly useful. It seemed easier just to start by taking one of the DDS and build the rest around it. The only other materials are double-sided tape and black duct-tape. I didn't use silver duct-tape as it is so terribly terribly démodé
The 10x8 darkslides are stupidly expensive in Europe and it took me over a year to find two on eBay at a lucky BIN price - not at all a bargain, just barely acceptable. They are ½ the price in the US.
Making it took me about 2 hours including tea breaks and wouldn't have taken that long had I not made a basic error of measurement and had to find a way to rescue myself from it. Or had less tea maybe.
Almost the trickiest bit was making the "groove" in the backplate, but I also found it very hard to cut all the board so that the cut edges are 90° to the plane surface.
It's surprisingly rigid (although I did end up adding an extra layer of foam board as part of my rescue tactic, so that probably helps), very light, but also slightly off-balance once the DDS is in - needs a bit of extra weight at the front to sort out the moment.
The bungees to hold the DDS in tight are made from scrunchies tied together, and the pinhole from a can of Dr. Pepper someone had thrown over my garden wall. I used the "press on the metal with a ballpoint pen until it dimples then sand the dimple 'til there's a hole" method.
Pinhole is ~0.57mm (measured with my enlarger), focal length is ~150mm, so ~f/260.
The next mod will be to epoxy a couple of 3/8" nuts to pieces of board, made flush with more foam board and glued to bottom and side, so I can use a tripod.
It's enormous. I can't imagine walking down the street with it under my arm ...
It is made from 5mm black foam board. I found the Stanford pinhole instruction sheet, but found them only partly useful. It seemed easier just to start by taking one of the DDS and build the rest around it. The only other materials are double-sided tape and black duct-tape. I didn't use silver duct-tape as it is so terribly terribly démodé
The 10x8 darkslides are stupidly expensive in Europe and it took me over a year to find two on eBay at a lucky BIN price - not at all a bargain, just barely acceptable. They are ½ the price in the US.
Making it took me about 2 hours including tea breaks and wouldn't have taken that long had I not made a basic error of measurement and had to find a way to rescue myself from it. Or had less tea maybe.
Almost the trickiest bit was making the "groove" in the backplate, but I also found it very hard to cut all the board so that the cut edges are 90° to the plane surface.
It's surprisingly rigid (although I did end up adding an extra layer of foam board as part of my rescue tactic, so that probably helps), very light, but also slightly off-balance once the DDS is in - needs a bit of extra weight at the front to sort out the moment.
The bungees to hold the DDS in tight are made from scrunchies tied together, and the pinhole from a can of Dr. Pepper someone had thrown over my garden wall. I used the "press on the metal with a ballpoint pen until it dimples then sand the dimple 'til there's a hole" method.
Pinhole is ~0.57mm (measured with my enlarger), focal length is ~150mm, so ~f/260.
The next mod will be to epoxy a couple of 3/8" nuts to pieces of board, made flush with more foam board and glued to bottom and side, so I can use a tripod.
It's enormous. I can't imagine walking down the street with it under my arm ...