I think I'm going to jump m4/3's ship because of UltraWideAngle

peppermonkey wrote:

If you are thinking of getting a systems camera "just" to use one lens on it, specifically a specialist lens like an UWA lens...why not just forgo a systems camera entirely and get a specialist wide angle fixed lens camera like the Sigma DP0 Quattro? Sure, it's a more annoying and slow camera but within its limits, it'll provide better IQ than anything south of a medium format camera (and probably competes in that tier as well) and certainly better IQ than the cameras you are considering...

Otherwise, i would stick with M43 simply because I can still use my other lenses plus getting a UWA that is still great. Sure, ultimately it may fall short a little comparing to the other camera in consideration but I would imagine the differences in real world would be insignificant, specially compared to the IQ difference between the DP0 Q and the others. This is of course with the assumption that you won't be using high ISO (above ISO1600).

The other option I would consider is the new Nikon DL18-50. Would be worse IQ but you gain incredible portability and I would presume the IQ won't fall too far behind.

Basically, I would consider the Sigma, Nikon and one of the 7-14mm m43 lens before bothering to get a systems camera and only use one lens on it.

Thank you. I checked out Simga DP lineup and although the Foevon sensor is mind blowing at ISO 100, it is not gonna work for darker situations when you need higher ISO or longer exposures without tripod (Also DP0 Quattro is huge).
I am going to wait and see how Nikon DL18-50 would perform with its 1" sensor. I wish they made a DL14-24 too.
For now, there seems to be a lack of single focal ultra wide camera.