720 DEGREE IMAGE Bog roll camera. (2 x 360 degrees). One of the
most rewarding as well as bewildering approaches to pin-holing
is imaging on the inside of a cylinder. This is an excellent
teaching tool, forcing the user to mentally combust whilst
getting a healthy understanding of aiming without a viewfinder.
It is also a great use for the inside of a used toilet roll. For
teaching and general experimentation, photographic paper works
fine for all the methods below. Pringles box (10 x 8), Poster
tube (5 x 7) and toilet roll tube (5 x 4) cameras. The last time
I taught this, the insides of toilet rolls were taken from all
the conveniences of the University, making me highly unpopular
with the cleaners! 1. Get the inside of a toilet roll. 2.
Flatten a sheet of aluminium cut out from a beer – coke can. 3.
Cut out two circles of aluminium the same diameter as the roll,
using it as a template. 4. Push a pin through the center of each
of the circles of aluminium. 5. Sand down on both sides of the
hole using 1200 gr