Bests & Worsts Reviews from Amazon

I was very excited for this lens to come out, and had one on pre-order as soon as I was able. I was lucky enough to already own the Canon 35L, so I was able to do some side by side comparisons. Just as every review site on the web has said, this lens is flat out amazing. The color rendition and contrast was easily on-par with my 35L, and sharpness was much better than the 35L. Build quality is amazing, and really more on par with the Zeiss type lenses than any of the Canon L series. It feels good in the hand. Solid and smooth. The focus ring is large and easy to turn, while still providing a comfortable level of tension to keep the adjustments from being jumpy. I did have to dial in +2 Micro Adjustment on my 5D3 in order to get the best results, but once that was done, the sharpness far surpassed the sharpness of my 35L. Long story short, after a week with the Sigma 35, my 35L was up for sale. Cons: Sigma used this new lines of lenses to try to reinvent themselves as lens makers, and show their dedication to a superior product. With all of that build-up, I was disappointed to have to add +2 MA to make the lens right when it was fresh out of the box. However, I haven't noticed any focus shift issues like previous Sigma lenses I've had. Filter size - The nice thing about Canon L's is that for the most part, everything is 77mm or 72mm threads. Sure, I could get a reducing ring to make my 77mm filters work on the Sigma, but that would be at a cost of not being able to use the hood. I do like the smaller form factor of this lens though, and don't find myself needing to use a CPL on a regular basis like with some other lenses. In short, if you already have a 35L, by buying this lens, you'd gain a good bit of sharpness wide open. If you don't have a 35mm f/1.4 already, I'd highly recommend this one above the Canon, and above the Zeiss.