The viewfinder isn't mounted in that picture. The two knobs on the right are from the lens to control the speed (125, 250, 500) and the aperture. The knob on the left is the shutter trigger. Shutter cocking is done by removing the ground glass from the back (which is how you preview focusing). Focusing is done by rotating the front side which is actually a giant hollow screw. The indentations are finger grips for rotating.
I have details for all my 3D printed cameras, unfortunately they're under my real name.
The viewfinder isn't mounted in that picture. The two knobs on the right are from the lens to control the speed (125, 250, 500) and the aperture. The knob on the left is the shutter trigger. Shutter cocking is done by removing the ground glass from the back (which is how you preview focusing). Focusing is done by rotating the front side which is actually a giant hollow screw. The indentations are finger grips for rotating.
I have details for all my 3D printed cameras, unfortunately they're under my real name.