My guess is that the lens was dropped at some point and caused an element to shift out of alignment. This is really too bad through and they shouldn’t have sold the lens to you.

I once purchased a new tripod from B&H that arrived damaged. asked for replacement. they agreed. I sent it back and then received the same tripod repacked. when i told them about it they didn't believe me, but after some time finally received full refund. Another time they sent me a wrong hard drive and refused to provide free shipping label for return. these are 2 bad experiences out of about 100 positive, so i forgive them.

I had the same with a Zeiss Planar and it was poor factory quality. Sent it to a lens specialist and it’s now perfect. Seems Cosina can be a bit slack on quality.

This is the 28 f2 ultron right? Ive heard so many good things about it, this particular lens may just be a 1-off dud

The old 28mm Ultron was quite soft. I also sold mine off too. There is a newer version but once bitten twice shy.

There’s a version 2 of this lens now! I understand your experience may have just been a bad copy, but the new version too also has improved optics and better overall sharpness. It’s a tad more expensive, but you should check it outb

28 is a focal I want edge to edge which means aspherical design. So it rules out a lot of vintage stuff. Leica Elmarit is still 2k used. I guess this is why I keep the Ricoh GR.

Ah... buy another version of the same lens... you can see from other reviews that not all of them back focus so badly at F2.

Hi sorry to hear that, but it's weird I actually just bought one myself today and mine's doing well. I had this exact experience when I bought Voigtlander 35mm f1.4 MC Classic. It focus shift open wide at further distance. I think it's bad QC on Voigtlander side. I think you should try to find the same one again but this time you have to try first and inspect accordingly. Because for the price, it is very good (my copy at least). Hope this help.

I have the same lens. You definitely have a lemon.

I'd a number of Voigtländer lenses too, but they aren't that great. I still have a Zeiss 50/1.5 which is great, but it'll also go in part exchange with a new Leica 21/3.4. It's better to have a set of top lenses from Leica then a bunch of glass, that doesn't meet your needs. Well, it's a question of money, but at the end, the quality will remain long after the price is forgotten. For my M-P 240 I've Summilux 50, a Summarit 90/2.5 and soon the 21/3.4. If you want a 28 for your M240, then look at a second hand Q. You'll get an extra camera body for free. That's a great deal. The Summarit range is not top noch as the Summicron or Summilux, but worth to try. I'm not found of 35 because it's too close to my 50 - I'm a 50 mm guy - but not wide enough to be a real wide angel. Keep on rolling.