Detail from Museum of Modern Art, Barcelona. Captured with an old manual focus Sigma 35-70mm f/2.8-4 Zoom Master, a lens I tended to use more and more infrequently as the years went by (and nowadays, never). It's far from a popular lens and generally gets a bad press. However, initially I found it to be quite acceptable. My copy is capable of returning very sharp images even wide open, provided the light is strong. It particularly suits ISO 100 and 200 films with saturated colours though, surprisingly to me, others have said that their colours turned out on the dull side. But - and this is a big but - the barrel distortion is really poor. I'm not talking expected normal wide-angle noticeable here, but ridiculously bad, especially visible in architectural shots with straight lines, that I eventually grew tired of the necessary post-processing to correct the verticals and retired it for good. This is one of the last images I captured with the lens and it's been skewed in Photoshop.