Here's a VERY fun AND addictive way to use the 50mms.. Much more applicable to right eye shooter..
It's good to have a magnifier, perhaps the OME-53 magnifier to bring up VF magnification to near x1.
Once that is done, look through the VF and focus to infinity.
Now still keeping your right eye on the VF, open your left eye.. You'll see a double image, it's ok and it is normal..
Now while STILL doing this, feel around and adjust your diopter till the image formed with both eyes open are no longer blurred/fuzzy..
So, what's the fun in it? You are literally shooting with both eyes open, AND if you notice, you kinda get a "phantom" frame with that vision. Go ahead and walk around and shoot like nutz that way and you will see what i mean by fun.
It's 10x better if you have a Katzeye or an Ee-S focusing screen installed. You DEFINITELY can see whether your subject is in focus, no kidding..