Simple Finder Solar filter

What you need :

a 24x36 plastic photo canister

a small piece of certified polymer visual solar filter

Caution : do not use non astronomy filter !!

a suitable bottle cap

How to do it ?

Cut a disk in the bottom of the photo canister, eg with small cisors.
Cut a disk in the cap (use a drill)
Place and scotch the filter on a sheet of paper then cut a disk which can be fit inside the canister.
After placing it in the canister bottom, secure by pushing the cap with a battery

The filter is done !