We build a pinhole camera using a pringles cardboard box and a digital camera.
We based out pinhole sizes around the formula given, 1.9 * sqrt(f * lambda), which worked to 1.9*sqrt(0.00055*210) = 0.64mm. So we based our pinhole sizes around that. We tried 0.5 (a little lower), 1mm (a little higher) and then 2 mm. We noticed 0.5mm was too small of a hole and not much light got in. 2mm lets a lot of light in, but blurs because we get too many light rays. So it seems like 1mm was the goldilocks size, just right!
We build the box to allow for different pinhiole sizes by leaving a dedicated pinhole portion in the box. As you can see from the first photo there's a dedicated portion in which different black rectangles(with different sized pinholes) can be dropped in.
All photos were taken with a 15 second exposure time.
California Hall
6400 ISO
Moffit
6400 ISO
California Hall
6400 ISO
Moffit
6400 ISO
California Hall
6400 ISO
Moffit
6400 ISO
Evans Hall
1mm pinhole 1250 ISO
North Gate
1mm pinhole 1250 ISO
Dwinelle
1mm pinhole 6400 ISO
Buildings by the Glade
1mm pinhole 6400 ISO
This project did a great job making us balance and tweak our settings. This project was also a ton of fun! These projects are great because we get to see tangible results!