Upload & Sell: Off
It's a wonderful small lens for almost all subjects, even allowing for the fact that most everyone makes a great 28mm (Nikon, OM, Leica). It simply does not comform to the usual formula - but as you see in the excellent images above, it seems to bend the image content around the frame in a remarkable way, and the edge drop off just adds to the character, and seems a small price to pay for the 'walk into the scene' characteristic.
And indeed it is *very* strong in the centre, about as good as the 21mm for the very centre at f5.6. Great 'colour harmony' also, and low distortion. At the price, everyone should have one. I often have to leave it at home, but it pains me to do so every single time. Another point: it is very consistent in delivering the goods. That's a great shot of the old Volvo..