10-26-2021, 03:50 PM
The optical construction seems indeed the same (12 elements in 10 groups).
However, the old version had 2 aspherical elements while the new one has: 1 H-ASP element, 1 ASP element, and 3 ED elements.
I guess this would account for the differences in MTFs?
Here are the 2 pages to compare their MTFs and constructions:
New version: https://www.samyanglens.com/en/product/p...hp?seq=543
Old version: https://www.samyanglens.com/en/product/p...hp?seq=351
However, the old version had 2 aspherical elements while the new one has: 1 H-ASP element, 1 ASP element, and 3 ED elements.
I guess this would account for the differences in MTFs?
Here are the 2 pages to compare their MTFs and constructions:
New version: https://www.samyanglens.com/en/product/p...hp?seq=543
Old version: https://www.samyanglens.com/en/product/p...hp?seq=351