LensTip.com

Lens review

Sony FE 35 mm f/1.8

2 November 2020
Maciej Latao

8. Vignetting

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

A7RII, APS-C, f/1.8 A7RII, APS-C, f/2.0
Sony FE 35 mm f/1.8 - Vignetting Sony FE 35 mm f/1.8 - Vignetting
A7RII, APS-C, f/2.8 A7RII, APS-C, f/4.0
Sony FE 35 mm f/1.8 - Vignetting Sony FE 35 mm f/1.8 - Vignetting


Small dimensions of the lens mean you can notice distortion already on the smaller detector. At the maximum relative aperture that aberration reaches 33% (−1.15 EV) and then, on stopping down to f/2.0, it slightly decreases to 31% (−1.08 EV). Some chances to spot vignetting you get even by f/2.8 where we got a value of 22% (−0.74 EV). By f/4.0 and f/5.6 you deal with almost imperceptible level of that aberration and in these places we measured, respectively, 16% (−0.50 EV) and 15% (−0.46 EV).


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 let's check the situation on full frame – appropriate thumbnails are shown below.

A7RII, FF, f/1.8 A7RII, FF, f/2.0
Sony FE 35 mm f/1.8 - Vignetting Sony FE 35 mm f/1.8 - Vignetting
A7RII, FF, f/2.8 A7RII, FF, f/4.0
Sony FE 35 mm f/1.8 - Vignetting Sony FE 35 mm f/1.8 - Vignetting
A7RII, FF, f/5.6 A7RII, FF, f/8.0
Sony FE 35 mm f/1.8 - Vignetting Sony FE 35 mm f/1.8 - Vignetting


As we expected there are a lot of problems here – not only vignetting reaches really huge levels but also that aberration reacts very weakly on stopping down the aperture. By f/1.8 we got a result of 67% (−3.17 EV), and it decreased just slightly to 66% (−3.11 EV) on applying f/2.0 relative aperture. Also by f/2.8 and f/4.0 the brightness loss in the frame corners was very high, and we got in these places the following values: 64% (−2.98 EV) and 61% (−2.76 EV). Further stopping down helps but to a not especially satisfactory degree – by f/5.6 the aberration, described here, reaches 58% (−2.54 EV), by f/8.0 it amounts to 56% (−2.37 EV), and by f/11.0 it decreases to 52% (−2.14 EV). Even by f/16.0 you can talk about a high degree of vignetting because our measurements still showed 49% (−1.95 EV).

It seems that, while taking photos with the help of the Sony FE 35 mm f/1.8, you won't be able to avoid vignetting no matter what aperture value you are going to use.

Sony A7RII, JPEG, f/1.8
Sony FE 35 mm f/1.8 - Vignetting

Below we present averaged out values of brightness loss shown in concentric circles as you move further away from the frame centre. The numerical value for every image, expressed in percents, shows the area limited from the top and right by 100% and from the bottom by the presented curve. The area indicates how much light overall is lost due to the vignetting effect. Please don’t mix these percentages with the values given at the beginning of the chapter because they aren’t directly connected.

Sony FE 35 mm f/1.8 - Vignetting

f/1.8 f/2 f/2.8 f/4