LensTip.com

Lens review

Samyang AF 24 mm f/1.8 FE

7 September 2021
Maciej Latałło

8. Vignetting

First let's check vignetting performance for the smaller APS-C sensor – appropriate thumbnails you can find below.

A7R III, APS-C, f/1.8 A7R III, APS-C, f/2.0
Samyang AF 24 mm f/1.8 FE - Vignetting Samyang AF 24 mm f/1.8 FE - Vignetting


Small physical dimensions of the lens mean you can notice vignetting effects even on the APS-C class detector. At the maximum relative aperture that aberration level reaches 29% (−0.97 EV) and it decreases to 17% (−0.53 EV) on stopping down the aperture to f/2.0. Any distinct problems end by f/2.8 and f/4.0, where we got the following results: 16% (−0.49 EV) and15% (−0.48 EV) respectively.


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

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

Now we should check the situation with full frame – appropriate thumbnails can be found below.

A7R III, FF, f/1.8 A7R III, FF, f/2.0
Samyang AF 24 mm f/1.8 FE - Vignetting Samyang AF 24 mm f/1.8 FE - Vignetting
A7R III, FF, f/2.8 A7R III, FF, f/4.0
Samyang AF 24 mm f/1.8 FE - Vignetting Samyang AF 24 mm f/1.8 FE - Vignetting


According to our expectations there are a lot of problems – not only vignetting values are huge but also the lens doesn't react well on stopping down. By f/1.8 we got a result of 61% (−2.70 EV), and it decreased to 49% (−1.94 EV) after applying the f/2.0 relative aperture. We also noticed a significant brightness loss in frame corners by f/2.8 and f/4.0, with values of 40% (−1.48 EV) and 39% (−1.44 EV) respectively. Further stopping down didn't have any measureable effect on the aberration, described in this chapter.

Sony A7R III, JPEG, f/1.8
Samyang AF 24 mm f/1.8 FE - Vignetting