Paul, a problem I'm afraid. I tried the 10mm non-macro RX lens again on a Bolex EBM regular-16 camera, plus the Aspheron in front. There was no vignetting visible. However, when focused for fairly near distances like across the room for example, the closest focus on the lens was not sufficient for sharpness. I was using max aperture of f1.6. When I unscrewed the lens slightly the image got sharp. So it looks like a shim behind the lens would be necessary for these sorts of distances. And maybe at longer distances too, as your lens could be callibrated differently from mine. With the macro 10mm lens of course there's not this problem.
So the non-macro lens plus Aspheron isn't an ideal combination, especially if doing close-ups.
Edited by Doug Palmer, 07 March 2018 - 01:58 PM.