But first the positives:
The build quality makes an overall good impression and the manual is also very easy to understand - it is supposed to have been people who have apparently demolished the rubber clam from its frame ;-)
Mounted on the camera sits the part relatively tight, which I think is sufficient (if you absolutely it creates, you can of course still way under his game somewhat and forth).
What I do not like about the product:
The first look through my camera equipped with the extension has disappointed me because the viewfinder image was distorted barrel-shaped.
Furthermore, I realized that it was decided not to entspiegeln the rear lens. If you wear glasses as the light in the back or from the side, then interfere substantial reflections to look into the eyepiece (as eyeglass wearers can not just close the eyepiece with the orbital finish).
But even without direct reflections I had constantly a bright circle of light on the ocular lens, which clouds the strong perception of the viewfinder image.
Conclusion:
The viewfinder itself and the recording parameters I can fully identify with it, although, for me, however, outweigh the strong restrictions.
It makes taking pictures ** ** no fun! I'm no better extension clearly because the impression of the viewfinder image is much clearer.
Also I wipe it gladly times a nose print from the screen, which I have, incidentally, provided with a protective screen display Delamax (Den Delamax screen protector I can in any case fully recommend !!).