Many of the examples have both color and black and white renditions, the Touit 12/2.8 Distagon making a very fine lens for black and white work due to its high contrast and superb color correction.
Hakan K writes regarding the distortion comparison and examples:
I know you haven't finished the full review on this lens but even the samples you took tells me how thoroughly you profess in what you do.
Parameters like contrast, colour correction, rendering, back focus, sharpness, CA, diffraction, sharpness gradient, separation, flare control, colour uniformity, ergonomics you name it, I find all I need to know in just a few minutes by reading your review and I get that before even some other bloggers mention that the lens exists. I've been looking for a compact UWA lens+ camera solution for quite sometime. So I looked around I wasted hours and haven't found anywhere the kind of information I read in diglloyd.com. I shouldn't be asking as a reader to the blogger oh what about this what about that and I shouldn't need to be buying to find out myself. That's the very purpose of their existence.
DIGLLOYD: the question I continually pose to myself is the same one I posed about 8 year ago: what do *I* want to know that I cannot seem to find? That frustration in finding what I wanted to know (without having to buy it first) was the genesis of this site. I hold myself to that idea with each camera or lens I review. Which sometimes means a lot more coverage than anticipated, and sometimes cutting something short.