Mechanically good - seems not helpful for all lenses

Positive; The thing is really solid and well-crafted milled. Fit could not be better - in the Astro Shop you pay 10 euros more without chip and shaky. The automatic exposure seems more stable than without chip with the adapter because it pretends 55mm f / 1.4.
Negative: However, the thing for my purpose is (faint, 500 mm f / 8 Russians ton) in full sun exposure and good contrast with the D10 only "hit and miss". For the adapter (almost) nothing, info would have been good. What annoys that appears display will shine with my 10D with the adapter darker, which worried me a bit. But it works a little bit better on my 5D (full frame). One point deduction.