bobbytan I have an adapter with aperture built in. Not ideal but it works fairly well with lenses where the rear element is close to the rear of the lens. The macro 100f2.8 and 400mm f5.6 it does vignette very early on as these lenses have quite a lengthy tube built in, for obvious reasons. Lenses like the 50 and 85 It does give a decent amount of depth of field.
Bob enjoy it over the week end I would respect your opinions.