OzRay
Mu-43 Hall of Famer
I was looking at the aperture of the latest M mount Voigtlander the other day and noticed that it appeared not to open fully. Here's a shot of the aperture from the back of the lens (nice and round by the way):
As you can see, the aperture appears as if it could open considerably more than it does. If it could open fully, it would increase the speed of the lens substantially by the looks of it. I contacted the supplier just to see if this was normal or whether the aperture was faulty. It appears that this is normal.
So has Cosina Voigtlander deliberately made it so that the aperture won't open fully, in order to controls aberrations etc? I'm curious, as I'd be happy to be able to open the lens further and possibly live with any aberrations that may arise.
Cheers
Ray

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As you can see, the aperture appears as if it could open considerably more than it does. If it could open fully, it would increase the speed of the lens substantially by the looks of it. I contacted the supplier just to see if this was normal or whether the aperture was faulty. It appears that this is normal.
So has Cosina Voigtlander deliberately made it so that the aperture won't open fully, in order to controls aberrations etc? I'm curious, as I'd be happy to be able to open the lens further and possibly live with any aberrations that may arise.
Cheers
Ray