Hot shoe-mounted viewfinder visor

If you wear glasses (or sunglasses) and shoot photos outdoor with a DSLR, you must have been annoyed by how sunlight from atop blinds you when you are looking through the viewfinder. No viewfinder-mounted visor can solve the problem because your glass prevents your eye from touching the visor. Well, this hot shoe-mounted viewfinder visor is here to help! It's simple yet effective. Print, insert into the hot shoe upside down, and go out shooting in the sun!

I have designed and tested it for my Canon 5D and 6D. The same principal should work for all DSLRs with hot shoes. If it doesn't work for your camera, leave a comment about what changes are needed, and I can upload a working version for you. Similarly if you can measure the hot shoe size of non-Canon cameras it should be easy to change the design too.