From the external processing, I can say that they are very similar to the original is really good, but what really matters are well known, the inner values.
But from the front.
I was looking forward to shooting without battery change and stuck directly 2 Canon battery grip BG and the EOS 50D. Turned the camera and worked well - with the camera shutter. The trigger on the battery grip but went only at extremely resistant Press that but even in manual focus.
Unfortunately, a return, it was saved at the wrong end.
