OM adapter confusion
One of the most funny moments with my nex 7 have been using my Ex-sleeping-in-my-shelf om 50mm 1.4.
Please check any of these TILT om to nex adapters. You can use it as a normal lens if you dont tilt, and tilt it and make funny defocus effects. You have 2 in 1.
With my adapter, and I imagine with any other tilt or not tilt capable, you can use any aperture and all the focus range. Aperture is set in the lens and my focus ring goes from side to side all the way.
Old OM lenses are price increasing since some time (and they'll keep on) because there's been some kind of rebirth with the arrival of mirrorless cameras.
Feel free to check some images with om tilt adapter here in my flickr:
I'd take a tilt adapter, besides great fun you can take a very interesting effects like this where it seems the girl is blurring the image as she's sweeping on: