[Sigma 10-20 EX DC HSM] The best (ultra-) wide-angle lens
From ruessler
With the 10-20mm Sigma has an excellent lens in the program. It shows the other competitors in many respects, what is a rake. Of course, it also has little weaknesses, but that one sees across, if you realize what this lens has strengths.
The image quality is excellent, the sharpness is very persuasive. Only Aperture can open it blurs the edges to come, but this is for most lenses so. Everything is grayed out in the green area.
The vignetting makes Although noticeable, but is easily correctable with postprocessing. Such a lens requires postprocessing on the computer anyway, also in order to correct the distortion that inevitably occurs.
The autofocus is fast and quiet, thanks to HSM drive.
The workmanship is very good. Recently, Sigma finally establishes a proper lens cover for where you removed the front hineingreift – finally, the old lid, the one on the side abpulen had, was an affront. Also contains a lens hood and a bag of useful.
I can fully recommend this lens, because it gives you possibilities you with longer focal lengths does not have! With the beginning of 18mm focal length (29mm equivalent) you can eventually become unable to go back 
.
A few words about the comparison with Canon’s own 10-22mm. This is more expensive, has no lens hood at (and that you must buy is enormous) and is darker from. Especially the latter fact is similar to light the alleged weakness of the Sigma lens again.
I’ve tested both lenses and find the Sigma even much sharper!
So the choice should really be clear: Sigma 10-20mm. Of course nothing for the 5D – because there Abdunklungen that you no longer can be described as vignetting … but that’s a lens for digital times now clear.
translated from amazon.de customer review.
