When you look through your dslr viewfinder what you see? Some of you see nothing (mostly because cap is on) and some of you see what normally you don't wanna see (like cats and other too cute stuff for pros like us) But what to do when you wear SquarePants that don't fit your viewfinder and your pocket is empty to buy hassel or other real heavy mens pulling muscle medium 6by6 only right format camera. I can't help you with that but i can help you to see your world in right way and by that i don't wanna narcotize you or by sending you to Specsavers. I wanna work with you around your dslr viewfinder. Be warned you need more like basic skills to do this mod, when you are not comfortable with that simple don't do it. If you still want to do this, find a clean, well-lit dust-free place and let's get started:
Open small door holding focusing screen, (find how in your camera instrucion-manual book)
take out focusing screen, don't scratch be gentle with,
use tape to cover sides of glass like above. Don't have to be yellow - blue, black or clear do the same work.
Put back screen in the camera.
Now we have nice insta-square view.
This mod does not affect your pictures is just small framing help. When you need some right now special effects use old lady tights on your lens - that always works.
Last words: for this mod i use my old camera i will never do that on fresh new dslr... that all folks. Happy New Year!!!