I was expecting a fast 35mm lens to deliver the type of roll off at wide open apertures that the lens indeed did deliver. Certainly the Ultron 50/1.2 has some the potential to satisfy those that want to employ the type of 'character' it lends itself to in their lens collection.
Well I've been 'testing' the Voigtlander M mount 50 Ultron f1.2 over the last couple of days on the GFX and the SL2 via a Fotodiox M to GFX adaptor and the Leica M to L adaptor (which included some decent blue skies and light) and long story short it is going back.
From a handling perspective the lens is very well made , focuses smoothly and of course has the utility of aperture ring on lens. I haven't bothered to test the lens on the SL or the CL or the Fuji XT-3.
Quick summary of why I am not happy is ( usual caveats - maybe I am not capable of using it/ maybe my example was a 'bad one' etc etc etc)
I suspect that the newer formulations coming out from Voigtlander labelled as apo with Sony mounts - may have corrected for these issues below.
1. Severe green fringing and chromatic aberration when viewed at 1-2X - as I print large this isn't acceptable to me and can't be fixed in PP
2. On high MP cameras achieving critical focus was extremely difficult if not impossible using pixel peaking and magnification - again perhaps more skilled shooters may not have this problem
3. Severe vignetting which depending on shot and circumstance can or cannot be fixed in C1/LR in PP - hence the need to crop
4. The lens is not sharp ( well not up to Fuji standards ) at distance irrespective of care taken to shoot.
5. I am not interested in buying after market lens flanges and coding the lens - why Voigtlander didn't provide the simple amenity of at least a blank but machined 6 digit lens flange ( since it has a Leica M mount) is beyond me.
Happy to post some examples of why it may look good at first glance but doesn't pass on detailed viewing if anyone is interested.
Pete