02-13-2015, 09:38 PM
The new lens is a retrofocus design with a very strong negative front element. There are then two doublets (=color correction) that make up the first bit of the "P" group of a retrofocus design. Following that is the focusing group which has been made into a triplet. Optical power in there and around it is somewhat mild - expect low focus breathing. Then there is a classic gauss doublet and a triplet construction for the rear element.
In theory this all allows a very good performance, especially low CAs. We will see. Interesting choice to go with the retrofocus form when the flange distance would accommodate a biotar.
...yadda yadda optics stuff...
In theory this all allows a very good performance, especially low CAs. We will see. Interesting choice to go with the retrofocus form when the flange distance would accommodate a biotar.
...yadda yadda optics stuff...