Re: Which Voigtländer 28mm m-mount lens shows least corner smearing on e-mount?
In my opinion 28/2.8 Color-Skopar adapts pretty well but it's still necessary to stop down to f8 for best corner-to-corner results (extreme corners improve until f8). I've had all of them in VM / LTM and only used them adapted. 28/2.8 Type II is also the smallest and lightest of the CV options.
From the current VM lineup I've only kept the 28/2.8 VM, but it's in part because 28/1.5 and 28/2 APO were released as native E-mount options and I got both of those. I still found 28/2.8 to be the most appealing option when adapting. It does have relatively high vignetting though.
Re: Which Voigtländer 28mm m-mount lens shows least corner smearing on e-mount?
In my opinion 28/2.8 Color-Skopar adapts pretty well but it's still necessary to stop down to f8 for best corner-to-corner results (extreme corners improve until f8). I've had all of them in VM / LTM and only used them adapted. 28/2.8 Type II is also the smallest and lightest of the CV options.