Other regrets the lack of stabilizer and the inability to attach a screw filter (because of the convex lens and the integrated sun visor). It is this last point that made me hesitate strongly on the choice of this objective. There is one solution with Cokin filters. While impressive, this system is one of the only feasible for this purpose (the Lee system is also adaptable, I think) with serial X Pro filter holder and adapter ring for X series 77mm diameter. Note that I did not try this system seen on the internet but it will not be long (I will correct my review time).
Besides the fact that this is the Sigma lens with the widest angle (fisheye except, of course), it is also the best level dive Canon 10-22 or 11-16 Tokina who do not have either of stabilizer and which are, in my opinion, its closest competitors.
Due to the ultra wide angle, the picture is slightly distorted at the corners to 8mm but the correction is possible by means of DxO Optic Pro software version 8. Version 6 of the software did not recognize the objective, I do not know not for v7.
In conclusion, this objective requires certain constraints, but there is no more UGA as this and this is what I wanted, so I regret absolutely not my choice.
