The Sigma lens was bought primarily for the fast aperture on a 1.6 crop Canon 80D for my daughter's indoor portrait work. This lens has a chequered history with many articles about the problems with achieving accurate auto focus.

Sharp Focus

Got this lens for my canon 80d. I noticed very soon that I was having focusing problems. I was hesitant to attempt to use the dock, so I sent the lens of to sigma together with my camera and they calibrated it for me. It now works really well and I'm very pleased.

This is my second favourite lens to use overall and my favourite lens to use for landscapes. I own a Canon 80D and I love how sharp my photos look. I'm not too technical when it comes to lens specs but as a casual photographer I usually have this and my 24-70 in my bag.

This lens was right out of the box and onto my camera. I found the focus to be tack sharp without any tuning and all focal lengths tested. Great color and contrast. Focus was fast and quiet. The constant length, and non-rotating lens is a plus for me.

I have no hesitation in joining the chorus of praises for this lens as far as pure optics and ground breaking parameters. If you want to replace 2-3 prime lenses and can adjust to the size and weight, this is lens can do the job, but for me, the limited range and lack of stabilization made it a...

Great Lens. Still quite sharp wide open. even better at 2.8. Solid build not too heavy. Has a72mm filter wish it was 77mm. Overall 5 stars

Venía usando el Tamron 17-50 2.8 y realmente es un paso adelante pasar a este Sigma. Lo probé en su versión para Nikon con la cámara de un amigo y quedé encantado y pedí el mío para mi Canon 7D.

This is a classy lens for APS sensor cameras in every way. Build quality is first rate with smooth zoom and focusing action. It is a perfect match for my Canon 70D (or a 7D) Image quality stopped down is razor sharp with virtually no distortion or vignetting.

Excellent build and image quality

One needs to use this lens with care due to the shallow depth of field

A product of perfection. Beats all the other lences in the range provided by NIKON or CANON.

I don't need to re-state what others have already said. This lens is heavy, big, only a 2x zoom, and produces absolutely phenomenal images. I mount it to my A6500 all the time (with the MC-11 adapter), and it never disappoints. Highly recommended.