Originally posted by clawhammer How well does the magnifier work? Does it mask any of the frame (ie, reduce coverage)? I've been thinking of getting one to assist with my 200 2.5. With a strong eyeglass prescription, it's hard to see if it's in focus w/o the focus-assist blinks.
So far, it's been good, mind you I've only had a for a short while!
It doesnt mask much of the frame in my opinion, perhaps some "vignetting" is the best way of describing how the view has changed. (The corners are the areas masked). The light up information inside the viewfinder is not blocked.
I think it is perfect with glasses use, because it protudes from the camera body so you don't have to press your glasses (or your nose) against the camera to find tricky focus.
Of course, experience may vary, but I quite like it. I immediately noticed it was easier to manual focus with the magnifier.