I recently purchased the Voigtlander Z mount 50mm f/1. The build quality is impressive. The stop ring is on the forward portion of the lens barrel and this is manual focus only. At f/1 using a U/V filter w/hood there was slight corner vignetting which disappeared at f/1.2. Below are 5 images of a shoreline; f/1, f/2, f/4, f/8 & f/11 that I shot yesterday to evaluate DOF and definition falloff. This lens does have the contacts that assist with focus communication (red square turns green). There are some videos on “You Tube” that test this lens with the Zf also.
f/1 1/2500 iso 64
f/2 1/1000 iso 80
f/8 1/160 iso 220
f/11 1/100 iso320
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f/1 1/2500 iso 64
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f/2 1/1000 iso 80
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f/4 1/400 iso 140
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f/8 1/160 iso 220
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f/11 1/100 iso320
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