This looks very good for the CV 21 wide open. I am using the CV 15/4.5 on the NEX-5 and have been very happy with its performance. Of course at f4.5 there is no vignetting.
How did you balance the WB? This is very complex lighting.
Lens is the CV 21/1.8 @1.8, ISO 1600, M9. I'm very impressed with this lens. I can't say it's better than a Summilux 21mm but at 1/5 the price, it pretty close and has to qualify as a best buy. FYI, I have it coded as an Elmarit 21mm ASPH so the lens detail aperture that is shown is not correct. This setting pretty much eliminates vignetting.
How did you balance the WB? This is very complex lighting.