Conclusion: a perfect fit, engages and thus keeps very well on my 550D.
The gum was (out of the box) rather stiff, but what has been caused by the cold.
First brought to raumremperatur, he was supple and soft.
On the eye set, absolutely no light arrives from the outside! Well, I'm a little man with a small head gg
Big advantage that can be rotated to any position rubber, so I do not understand the vohrigen recessions ^^
Just the first time arrest in the hand and turning the thing!
Oh, one more thing, finally I see the whole viewfinder + the "adjustment bar" at the bottom of the screen!
All in all I'm very happy with it!
Can I continue with a clear conscience recommend :))