New Canon to E-mount adapter with build in iris

Postmaster said:
I have no idea how good it is and how it performes, since I don´t have any Canon lenses.
I just stumbled over this and wanted to share it with those, who have Canon glass.

http://www.foto-walser.biz/shop/Suche/walimex_Adapter_Canon_auf_Sony_NEX_Aperture.htm?VL=17421

Frank
Click to expand...

This looks like a rebranded Kipon. Any device in which the aperture is not placed at the internal focal plane of the lens group, will vignette the image and not adequately modulate the light.
 
I tried out the Kipon for one go... the fall off / vignetting is noticable very early. I wouldn't buy it again if I had to choose.
 
Those adapters are terrible. By buddy (DOSmedia) has one and even with his canon 50mm 1.8 is had some terrible vignette if you used the "build in aperture" at all. Maybe with like a 70-200 this adapter would be okay, but anything less and it sucks.
 
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