Re: FM Review of the Voigtlander 40mm f/1.2 Nokton
I've done a little testing with my Canon 500D to improve the 40/1.2's closeup quality as discussed earlier. Nothing scientific about the tests, but a brief look shows that, like the other attachment filters that some of you are using, it does make quite a difference in closeup resolution. At the same time, I also tried a Canon 250D (twice as strong), but results were nowhere near as good (not shown here). I didn't try it at greater distance, since my interest is in using it for flower closeups, but the filter strength is such that it's not going to have the ability to focus beyond close range.
First image pair is the naked lens at MFD, wide open, shot with A7R3; all images were processed in ACR with default sharpening (25/1.0/25); no further sharpening on the conversion to jpg. In each pair, there is the full frame for reference, then a clip at full screen res.
Second image pair is the lens + 250D; lens was set to about 1.7 ft distance to get about the same image size as with the naked lens. I'm impressed with the improvement here and plan to try it for flower closeups in the coming months.