Sony FE 40 mm f/2.5 G
6. Distortion
First let's see what such a move of the producer and optics constructors means in practice – I think here of the performance on the corrected JPEG files. On the smaller APS-C sensor you get a result of −0.05%, and it's −0.03% on full frame. The algorithms deal with the problem exceedingly well and, as a result, distortion is practically zero.
Only after analysing RAW files, developped with independent software such as e.g. dcraw, you see how the lens's optics really deals with distortion. There are a bit more problems but, as we've already mentioned, these values are not especially bothersome. On the APS-C sensor you have to look really hard to notice slight barrel distortion of −0.62%. On full frame you are able to notice deformations without any problems but still they can hardly be called high – we got a result of −1.44%. Such values are typical for classic full frame 35-50 mm lenses for reflex cameras that were offered some 10-15 years ago.
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| Sony A7R III, 40 mm, JPEG, APS-C | |||
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| Sony A7R III, 40 mm, JPEG, FF | |||
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| Sony A7R III, 40 mm, RAW, APS-C | |||
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| Sony A7R III, 40 mm, RAW, FF | |||
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