Ich denke er ist nicht wirklich von der Leistung im Foto Bereich überzeugt:

Using the Metabones Speed Booster for stills?

Of course the Metabones Speed Booster is not just for video, it also does a great job in the stills area, and what better way to test resolution? I though this would be the weak point of the adapter but that does not seem to be the case.