Maybe the focal lenghts of the two leses are not the same. Don't trust the catalog values.mb66energy said:neuroanatomist said:
Thanks for posting, but this is a strange result for me:
I always thought that the SAME SIZE of circles of confusion in out of focus distances is determined by the effective aperture but there are different DIFFERENT STRUCTURAL properties of the CoCs. But your photos tell a different story: Same FL, same aperture but DIFFERENT SIZE ... (If one would compare same T-stops with different optics I would understand the results)
Just apodization cannot change the SIZE but the STRUCTURE ...
Some interesting point for further research - I will do it perhaps later with 3 different 100mm lenses ...
An other reasen could be the effect "focus breathing". The focal lenght is defined for focusing to a distant point. At mfd, some lenses seems to be shorter...
At least that is how i understood it.
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