Here, here - I'd missed your posting, Gunvald. I'm not myself yet convinced that absolute edge sharpness is so vital as we never look at the periphery without naturally moving the bins slightly on a very wide fov. Edge to edge sharpness is, I think, more of a first impressions marketing tool that sells optics but which is not at all useful in the field if it means a less wide fov. In practical usage terms, I think I'd rather trade some slight peripheral loss of acuity for the widest possible fov.