Yes, but I have a couple of comments.
First, the MTF plots of E- and Z-mount versions seem identical; it's statistically impossible that two lenses optimized for different sensor stack thickness perform identically at the optical test bench.
Then, the VM version seems to suffers less from astigmatism and shows slightly better corner performance.
Is Cosina telling us the whole truth?
I think the VM vs. E/Z MTFs were already analyzed early in this thread (p.3 #6). Search results indicate that Cosina explicitly labels their MTF charts as "Calculated Values" 計算値 in their detailed product specifications and technical guides, so they are probably not measured results from a test bench.
It seems that e.g. Sigma also generally presents identical MTF charts for the E-mount and L-mount versions of the same lens model. I believe they also optimize for each sensor stack as L-mount is for their own cameras but E-mount is where they sell more. I've had some of their lenses in both E and L (Sigma fp) and never noticed any visible IQ performance differences between the mounts.
Apr 23, 2026 at 01:20 PM
Previous versions of Juha Kannisto's message #17026041 « Cosina Voigtländer APO-Lanthar 28/2 lens for E-mount & Z-mount got announced! »
