looking for a better F mount 45-65mm macro lens?

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Katamax
Katamax Forum Member • Posts: 81
looking for a better F mount 45-65mm macro lens?

Attached is the plot of vectors (enlarged by a factor of 50) of geometry errors of a specific 50 mm macro lens I own. It was done by photographing a Réseau plate with 20mm grid, reading the pixel coordinates and comparing those with the plate theoretical values:

To me, the pattern appears to suggest somewhat de-centered lens groups or elements.

Mean error is just slightly better than 0.1 mm on a target plane, with target size of 160x200 mm filling the 24x36mm sensor frame.

it is not bad, but I suspect there are better F-mount macro lenses  than the one I tested. Any suggestions for a lens with a considerably smaller distortion?

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