LensTip.com

Lens review

Sigma 85 mm f/1.4 EX DG HSM

20 December 2010
Arkadiusz Olech

8. Vignetting

First, let’s check how the brightness loss in the frame corners presents itself on a small sensor of the DX format. The thumbnails, shown below, will help us to do so.

Sigma 85 mm f/1.4 EX DG HSM - Vignetting


As you can notice the vignetting is practically nonexistent here. Even at the maximum relative aperture the light fall-off in the frame corners amounts to just 15% (-0.48 EV) and it decreases to a totally negligible value of 6% by f/2.0.


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

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

The chart below compares the Sigma with its competitors and you can see the tested lens wins hands down here!


Sigma
1.4/85
Nikkor
AF-S 1.4/85
Canon
85 mm f/1.2L
Samyang
1.4/85
Zeiss
1.4/85
f/1.4
15%
25%
23%
25%
21%
f/2.0
6%
10%
9%
9%
8%
f/2.8
2%
2%
2%
2%
2%


Let’s pass to the description of full frame results. The appropriate thumbnails can be seen below.

Sigma 85 mm f/1.4 EX DG HSM - Vignetting


At the maximum relative aperture the vignetting is visible as it reaches the value of 37% (-1.33 EV) On stopping down the aperture to f/2.0 this aberration decreases to the level of 21% (-0.66 EV) and it becomes not bothersome by f/2.8 where it gets to 16%. The problems with vignetting are over by f/4.0 and f/5.6 where the results we obtained amounted to respectively 12% and 9%.

How does the lens compare with its rivals? The chart below will allow us to assess it.


Sigma
1.4/85
Nikkor
AF-S 1.4/85
Canon
85 mm f/1.2L
Samyang
1.4/85
Zeiss
1.4/85
f/1.4
37%
48%
43%
38%
41%
f/2.0
21%
35%
22%
22%
22%
f/2.8
16%
16%
5%
13%
7%
f/4.0
12%
5%
4%
8%
5%


The advantage of the Sigma is clearly noticeable by f/1.4 and by f/2.0 where the tested lens gets better results than its competitors. In its case, though, we also observe the slowest decrease of vignetting on stopping down so by f/2.8 and f/4.0 the rivals prevail. Fortunately for the Sigma its defeat is still situated on a level which is not obtrusive so its defeat won’t hurt us much.


Sigma 85 mm f/1.4 EX DG HSM - Vignetting