Lens Correction Profile for Tamron 135mm f/2.5 03B

I have been looking for a vintage prime telephoto lens for a while, until I found this nice 135mm f/2.5 - not top notch, but close enough to more expensive similar vintage primes. Find more about it here: pentaxforums.com (archive.org link).

As expected with such a lens, chromatic aberration (CA) is an issue, especially wide open. Blue/red transverse CA is the most striking

Before and after lens correction on checkerboard, upper right corner at f2.5

Above: checkerboard calibration chart. Before (left) and after (right) applying the lens profile corrections in ACR. Upper right corner of frame.

Before and after lens correction on a real world example against a bright background

Above: real-world test: subject (a whip antenna) against a bright background, slightly off focus. Before (left) and after (right) applying the lens profile corrections in ACR. Upper right corner of frame.

Correction may be applied in postprocessing, but it is tedious and for sure having a previously calibrated lens profile take care of most of it is appreciated. I was curious in trying the Adobe Lens Profile Creator (archive.org link), so I printed one of the provided checkerboard charts and started shooting.

Find the lcp lens profile here: apasto/lensprofile_tamron_03B

In the README of the same repository I am also providing some notes on setting the lens and aperture metadata in EXIF when using a manual lens, using exiv2. That part includes the results of some research and substantial trial and error on the Exif parameters. An example batch call to exiv2 to set the metadata of the lens in questions (replacing the unknown lens reported by the camera) can also be found.

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