On 9/18/2018 10:33 AM, Jan Steinman wrote:
From: Michael Gordon <usher99@xxxxxxx <mailto:usher99@xxxxxxx>>
:-) It is not clear to me what aberrations lensfun is designed to correct.
Can you enumerate?
Here’s something to look at while sitting in an airport. :-)
http://lensfun.sourceforge.net/calibration-tutorial/lens-tca.html
<http://lensfun.sourceforge.net/calibration-tutorial/lens-tca.html>
Cliff Notes version: LensFun corrects for “Transversal Chromatic Aberration,”
as well as barrel/pincushion distortion and vignetting.
The question then becomes whether this correction works well for CA-like artifacts from non-telecentric lenses on thick
sensor stacks. Understand, I don't care a whit, for my own photography, but am pedantically asking the logical question.
As I recall, when Roger at LensRentals first looked at a Metabones, he found that it performed poorly on the bench,
until a fat, flat glass slab was put in the optical path, to simulate the sensor stack, and then did well. So it seems
they correct the problem?
T. C. A. Moose
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What if the Hokey Pokey *IS* what it's all about?
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