In message , Wally
writes
My camcorder has a 30.5mm filter thread. The stepping ring is low
profile, like a filter rather than any sort of tube. I think the lens
fits a 30mm thread. Haven't noticed any vignetting (didn't notice any
with the wider lenses that I tried in Jessops, either).

That shouldn't make any difference. I was talking about 30/37 or 37/30.
Most consumer camcorders seem to be either 30 or 37. Tele front threads
seem to mostly come in at 52, and WA at about 62 (if they have threads
at all).

--
Tony Morgan
http://www.camcord.info