02-26-2018, 08:46 AM
It's rather odd that the 70mm macro appears to have a 49mm filter thread. The old discontinued one had 62mm... and I think it was at the time lauded as the sharpest (practical) lens in the world, used by a couple of review sites as a reference unit. However, to become this it had to employ some glass that is no longer available, as Sigma had said. I wonder if the new one is going to be similarly remarkable?