I ticked aftermarket as that was the only yes option but what I have is actually a Pentax ME Super screen that I cut down to fit my camera. I found the tip on the net somewhere and knew I could handle the job. I bought 2 for $5 delivered off a guy that services SLR's and its been excellent. I was having trouble with my MF lens and this has helped immensely and the only problem i have found is if you want to pan you have to have the focus somewhere near what you need so you can see what your trying to shoot. It has also helped in making sure the AF has focused on what I want it to.