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you need a 24mm lens as this is the approximate Full Frame equivilant of a 50mm prime. I use Yashica 24mm f2,8 and Sigma 24mm f2.8 plus c mount lenses Pentax cosmicar 25mm f1.4 Wesley 24mm f1.4 (actually more like f1.8 or f2)   the c mount are CCTV lenses and fast and great for shooting at night outside.

Increase in digital noise in the IMAGE ....not noise as in sound!

I think there is nothing to justify. One needs at least the three classical lenses to choose from in a given situation. Wide angle ranges between 7 and 17,5 for MFT, standard between 20 and 25, 35-50 can be labelled portrait lenses, and 50 and above tele. From the good and fast wide lenses suitable for MFT, the SLR magic is still the least expensive.

I'm in the same boat. Trying to justify the $560 ;-;

Thumbs up on the Redstan clamp.   The retaining ring threads onto the Bolex. The thumb screws on the outer ring lock the retaining ring in place and also facilitate precise orientation of the anamorphic.   I've posted these images before........but seems relevant to post them again...      

        E-M5 has better stills, GH3 has better video. At least that's what consensus is.

Olympus lenses work on Panasonic mirrorless, and vice versa.  AF works better for each maker, in other words Olympus 17mm on an Olympus E-M5.  Both cameras do AF in video, but the GH3 has much better video modes.  Olympus is stuck at 30P, GH3 can do 24P, 30P and 60P.  Might not matter if you only do web videos, then either works.  E-M5 is more a stills camera, GH3 is more video.  I suggest trying them both to see which one you like.  They are both in the same price range.