if you'll follow the excellent link to that e-bay place of Dale's:Mine is the chrome-plated nickel type...not sure how you are
suggesting I separate parts of the adapter? I noticed a couple of
nicks and imperfections in the metal on the Takumar lens side surface
and and a significant pit on the EOS side of this particular adapter,
but do not know if this is causing the problem. Also, wonder if the
position of the stop screw could be the problem, since I sometimes am
able to wiggle the adapter into a positioni that works
http://forums.dpreview.com/forums/read.asp?forum=1029&message=27401505
there are quite few photos of the both adapter with various confirm chips
glued to them, and also several confirm chips of different types separated
from adapters. As your's one is chrome, the black confirm chip stands out rather
well I guess
and mechanical side is perhaps not what might be causing your problems,
have you considered photographing exact chip's contacts positions on every
of these adapters as suggested before? this should very easily isolate a
possible cause[es],
good luck,
jpr2