Now that is fast!
Voigtlander (Cosina) has been making lenses for Leicas and a few other mounts for many years. Many of these appear to be derivatives of older Leitz designs and many have garnered positive reviews. For the most part they have been making lenses for full frame 35mm cameras so it was quite a surprise to see them come out with an MFT lens for the Panasonic and Olympus MFT bodies.
The Voigtlander 25mm f/0.95 MFT lens.
You can see more at Stephen Gandy’s Cameraquest site. Retailing at $900 in the US, the lens is sold out with new supplies expected in a month or so. There are some excellent pictures taken by Andrew Fildes using the Voigtlander on an Olympus E-P2 body here and in addition to being a fine photographer, Andrew has taken almost all the snaps at f/0.95 so you can get a sense of the depth of focus at full aperture. To put the aperture in perspective, the depth of field of a 25mm f/0.95 lens is identical to that of a 50mm f/1.9 on a full frame body, so it’s like using an f/2 lens wide open.
A couple of warnings. The lens is huge compared to regular MFT optics, it’s heavy as it’s all metal. It has zero automation. As regards aperture that’s hardly an issue. If you buy an f/0.95 lens you aren’t going to be using it at f/8. On the other hand, the lack of focus automation strikes me as a big negative in street work owing to the time delay from manual focusing, and you will have to focus fairly carefully on nearer subjects to make sure things are sharp.
By contrast, the fortcoming Fuji X100 with it’s 23mm f/2 lens will have a depth of field equivalent to an f/4.5 50mm lens on a full frame body, so the Voigtlander has two stops less depth of field than the Fuji at maximum aperture. That’s significant and noticeable. Andrew Fildes’s pictures show the DOF well and it’s rare that you get a real photographer showing off gear so well. DPReview may be the best technical review site for hardware but it’s the very last place on earth you are going to go to for quality photography.
I have bought gear from Gandy in the past and he is honest and easy to deal with. He has been in business for ages.
New Panasonic fast standard lens:
Panasonic is rumored to be announcing a 25mm f/1.4 lens (50mm FFE) with full automation in February, and that sounds like a far more practical alternative to trying to manually focus the Voigltlander behemoth. The Panny will have the same depth of field as a 50mm f/2.8 on a full frame camera and sounds like just the ticket if the Fuji X100 disappoints. I rather miss out-of-focus backgrounds with the G1 owing to the smallish maximum aperture of the kit zoom. I would guess the price will be $700. There’s already a 25mm f/1.4 Leica Summilux for regular 4/3rds cameras at $900 but it’s bulky and not in keeping with the compact MFT design concept. The 20mm f/1.7 Panny is another option worth considering for the street snapper, at a fraction of cost of the X100.