Bon chui presque au boulot, chui tenté de faire le sigma à 200€ ajd histoire de pouvoir tout écouler sur une semaine et prévoir mon passage à autre chose pour début mai (mon annif )
Only a constant aperture 2.8 in a narrower zoom range or a fixed focal length and at much greater weight and overall size penalty will provide better performance at the two extremes of this lens. These faster lens cost significantly more, not all are as well matched to digital sensor needs and many of these lens are designed to perform optimally only at one end or the other of their zoom range.
The DC designation from Sigma means that you can't use this jewel on your 35mm film camera without vignetting and if you shoot a full frame digital sensor, this is not the lens you want.