Fotodiox Replacement Split Image Focusing Prism Screen for Canon EOS 7D

in the days of manual focus film cameras there was a thing called split prism it is a special piece of glass inside viewfinder allowing you to nail manual focus with precision analog cameras with autofocus and especially digital SLR cameras got rid of it as it was perceived they are no longer needed luckily many digital models but sadly not all of them have an option of interchangeable focusing screens so you can buy one and pop it in for better manual focusing the one I recently got is affordable chinese-made focusing screen from ebay reputable seller items delivered with a screen are sort 2 pincers cleaning cloth and two finger cuts to help you nuts to leave smudges on the focusing screen the idea behind split image focusing screen is simple twist focus ring until the broken image in sprin circle Center Alliance at that point it will be in focus also you can use ring field of micro pr