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Message: <blockquote data-quote="STM" data-source="post: 782120" data-attributes="member: 12827">I don't know if I would choose a focusing screen based on the needs of just one lens. Put it in, it takes some care, and just leave it there all the time. These are not like the screens on all of the F series cameras where you just pop off the pentaprism and swap out screens. You have to remove the lens, undo the retaining clip holding the installed screen, which may sound easier than it really is, and carefully insert the new screen (and brass shim if it comes with one), with the supplied forceps and re-clip the retaining clip. It is something you do at home over a clean workspace, not in the field.  To see if the AF works with these screens, I have put some AF lenses on all 3 of my DSLR's and the AF works perfectly with all 3. A split image/microprism screen is a good all around choice for all lenses, from super wide angle to super telephoto.</blockquote>