Summary: I have used this lens and also the Zeiss 28mm f/2.8 T* ZM Biogon Lens . The images from the Zeiss lens had better contrast and color, clearly nicer than this Voigtlander Ultron. The Zeiss lens is smaller and lighter as well. I don't see any advantage for this Voigtlander Ultron 28mm. If you are concerned about the difference in price, it is minimal.
Excerpt: Mounted on a Sony NEX 6 with a Voigtlander adapter, this lens provides 42mm equivalence and is very sharp and contrasty. The lens is small and balances well on the camera. There are no color shift artifacts. The lens is a pleasure to use with this camera, which provides great dual focus aids for manual focusing. And, the results are terrific. No noticeable distortion. Highly recommended.
Summary: For the price, this is an amazing lens. I waffled back and forth between getting a Leica 28mm $$$$ or Zeiss, then settled on the Voigtlander. It's super fast and pretty sharp, couples well with my Leica M6. Solidly built. I've shot mostly at night with it and I'm super happy with the results. If you can't afford a Leica lens, this is a great option, and you can't go wrong with the Zeiss Ultron either.
Summary: There is just something classic about this lens beyond the full manual, and all metal construction. Picture quality is amazing, and I have had fun with it shooting video. If I didn't have a Micro Four Thirds camera this would probably be my favorite lens. I was thinking too far into the future when I purchased this lens, as I don't have a full frame camera to use this with, I am not able to use this lens to it's full potential.
Summary: I had really high expectations for this lens on my leica m8. But it was soft, had backfocus issues, suffered from sun flares, purple fringe chromatic aberrations, and was not sharp at all even at f/8 and above. It had none of that magic that Zeus lenses and Leica lenses possesed. Poor effort on voigtlanders part. I'd just save my money and get a slower Leica lens in the same focal length. Voigtlander totally missed the boat on what could have been a stellar prouduct.
Excerpt: I studied up on this lens. The $$$ lens was simply too expensive! I use this lens for street photography and low light photography. Also the size of the lens draws less attention than the faster $$$ lens. I would recommend this lens too any photographer. i love it!
Pros: Consistent Output, Durable, Easily Interchangeable, Lightweight, Lovely little lens, Nice Bokeh, Rugged, Strong Construction
Excerpt: For the price, the 28mm f/2 Ultron is a great deal, especially when mounted on a Leica M8. The 1.33x crop on that camera will give you a hair's bigger focal length than a 35mm. It has pleasing bokeh, nice contrast, and is a easy performer on the streets.<br /><br />Of course, it will not be as sharp in the corners as a Leica Summicron, but you'll really only notice that in larger prints, and even then it's not signficant.