Swirly Bokeh? The legendary Carl Zeiss Jena Biotar 58mm f2 vs. the Russian copy Helios 44M-4 58mm f2 lens

Article abstract How does this well-preserved copy of the legendary Carl Zeiss Jena Biotar 58mm f2 lens  made in 1953 compare with a Russian Helios 44M-4 58mm f2 lens in MINT … Continue reading Swirly Bokeh? The legendary Carl Zeiss Jena Biotar 58mm f2 vs. the Russian copy Helios 44M-4 58mm f2 lens