Thanks for all the comments.
Yes, it is just plain glass, there does not appear to be any split image or other focussing aids.
My vision is pretty good (well, a bit long-sighted). I just find the split image very quick for focussing in urban photography. There is always a straight line to use as a guide - even with a wide angle lens. But I'll experiment with this and see how it goes.
I'd still be interested to know anyone's experiences with the Type B screen. It looks interesting.
Last edited by Roundabout; 11-15-2013 at 08:17 PM. Click to view previous post history.