Features Precision Matte surface, AF points REMAIN fully visible, and focus lenses Characteristics suited to bridge. This focusing screen features a matte field with split-image of the subject in the center divi ding in half horizontally for More Accurate manual focusing. The focusing screen is flat with glossy and matte translucent Surfaces Which Bring in a split circle in the middle is because it is in the field of micro-prism Surrounding ring. When the image is focused Correctly, the center circle and the full line Becomes Between Will Be Unbroken ., Other Wise, the line will separate into two halves the circle If you are using a hand lens focus, not Satisfied with the accuracy of your AF lens or a lens mount adapter are using; this split screen is your best choice as it Gives you matte surface Focusing That is Easier to manually focus with. for the best results use of Aperture of f / 2.8 or faster. An ideal purchase for users who Frequently with faster lenses focus manually. with C o mpat ible: Canon EOS 7D cameras Notes :. • Not recommended for use Slower Than lenses with f / 5.6 lenses With Slower thesis, the viewfinder will look Darker Than Original Actually With the standard screen • First, take off the lens and open the lock on the Focusing Screen devices. Then, remove the old Focusing Screen and put in The New Focusing Screen With tweezers and silicon. That touch the glossy surface faces Towards the outside surface and the matte Towards the pentaprism. • All pictures are for illu stra tion Purposes only. Actual Product May Vary Slightly two to Ongoing Improvements in design.