The Canon EP-EX15II Extender has proven to be exactly still missing accessories for my EOS 450D. After exceeding the 1000 limit on the number of shots, it was still not being able to see into the corners of the viewfinder most disturbing with glasses. With the Extender reduces the viewfinder image by a factor of 0.7 and I can now see the subject to be photographed completely finally. Also display the current camera settings no longer eludes my gaze. The size of the viewfinder image is reduced while a little, but it is absolutely not too small and still be a practical assessment of the recording situation.
The installation of the extension designed to very easily. It is mounted in place of the original pad to the camera and this in turn on the Extender. This pushing the extension is relatively tight, but not too stiff, thus ensuring a stable sitting at the camera. With careful handling, they can also be easily removed again.
As already mentioned in other reviews increases as pleasant side effect, the distance between the nose and the display.
Conclusion: All of glasses recommended in all I think is very.