I swore to myself when I started collecting lenses that I'd only use those of my camera's manufacturer but the Sigma changed that. I was lucky enough to get my hands on the lens before purchasing it and immediately noticed how sturdy this lens is. That in itself implied reliability and in the years i've been using the lens this has held true. The build quality is excellent. It feels rugged and unbreakable, but some may find it slightly on the heavy side if holding it for extended periods of time. The coating on the lens body ensures constant grip and the zoom/focussing rings are well proportioned for ease of use. This is a reasonably fast lens ...  Read the complete review

** Although this category is entitled "Canon fit" the lens is the same for all camera types and I have reviewed it in general ** Sigma is currently taking the lens market by storm as they bring out lens after lens for all types of cameras and all types of photographers; they are churning out lenses faster than some new members on here can churn out reviews! Some photographers prefer to work with a long zoom lens that will cover them from wide angle to about a 300mm zoom but the professionals like myself prefer to have a lens for every occasion. When it comes to macro photography (which for anyone that does not know what macro ...  Read the complete review

Bought this lens back in 2002 (Canon EOS version) and used it for 5 years for weddings and commercial work. Autofocus speed was excellent, and the f2.8 aperture allows Canon cameras use their high precision x-type sensors. Image quality was very good. Contrast not as good as similar L lenses but perfectly acceptable. Sharpness was truly excellent when stopped down to f5.6, and usable wide open. For the price this is an optically impressive standard room. Pincushion and barrel distortion well controlled. Vignetting acceptable wide open. Some CA, especially in backlit scenes, but correctable in RAW with software. Front element does not ...  Read the complete review

Sigma is a world leader in lenses and they are proving that they can actively compete with Cannon and Nikon This Sigma 70mm f/2.8 EX DG Macro Interchangeable Lens is a great lense, I was suprised just how good infact, I have several Macro lenses, by cannon and nikon and this is easily as good if not better. The build quality is superb, the lens feels very robust and the manual focus ring is nicely it feels very sturdy and looks like a very expensive Nikon lense as apposed to a cheaper alternative. The opticals on this lense are very good, I compared them from f/2.8 through to f/11 and f/16, noticed there was a little colour reproduction ...  Read the complete review