all I can say is use a good tripod!
other than that, it works fairly well, focus is easy on the LV (as long as it isn't bright sunlight!) if I were doing it for more than a quick test, I would want a hood/cloth over the back of the camera and my head to help with seeing the LCD.
OOF blur is same as usual for a Mirror lens, that is to say that OOF specular highlights are rendered as donuts, but that is to be expected.. bottom line is that IMO, the combination is quite useable... but that is only my opinion of course!
cheers,
S.
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beam me up captain, there's no intelligent life down here!