LensTip.com

Lens review

Sony FE 40 mm f/2.5 G

23 March 2021
Maciej Latałło

6. Distortion

After being attached to a camera body the Sony FE 40 mm f/2.5 G does what I personally hate. Let me explain. When I buy a camera with certain options I do so in order to have a free choice, not be limited.The tested lens deactivates immediately distortion correction option and distortions are corrected automatically. I completely don't understand and don't tolerate such an approach – especially that in case of this lens it's way over the top because its distortion is not that high to resort to such limitations.

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.


Please Support Us

The coronavirus crisis has been adversely affecting many businesses and, sad but true, ours is not an exception. Despite that difficult situation we would like to preserve continuity and high quality of publications available on all our websites. Still, we are now aware it might be impossible without additional financial help. That's why we would like to ask all those who visit, read, and care about Optyczne.pl, LensTip.com i Allbinos.com for support - it's enough you send us a small sum of money via PayPal. If a lot people decide to support our websites we think we'll stand a chance and survive next months without any lasting harm. We count on your support and understanding, stay safe and be healthy.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Sony A7R III, 40 mm, JPEG, APS-C
Sony FE 40 mm f/2.5 G - Distortion
Sony A7R III, 40 mm, JPEG, FF
Sony FE 40 mm f/2.5 G - Distortion

Sony A7R III, 40 mm, RAW, APS-C
Sony FE 40 mm f/2.5 G - Distortion
Sony A7R III, 40 mm, RAW, FF
Sony FE 40 mm f/2.5 G - Distortion