This is a great lens, it exceeded my expectations. Lightroom has automatic corrections for this lens which helps with any vignetting and color distortions at its largest apertures.

There was enough chromatic aberration on this lens to stop me bothering to use it.

Needed a lens for low lighting conditions. Can't get much faster than f/1.4 ! Sigma makes pretty good third party lenses . I had several with my old Minolta film cameras back in the day and they worked great. This is my first Sigma for a DSLR. Took it out for a test run yesterday.

Excellent lens with super clarity and ease of use. Autofocus is brilliant. Received superb compliments from my friends and relatives on the pics from this lens. Now i realise ive wasted waytoomuch time with my kit lens.

I have used this lens for portraits, landscapes and an 8 image panorama and it has produced the goods for me every time. Tack sharp with lovely fall off in the portraits and great detail in the landscapes and panorama. I can't fault it.

Durable; Fast; accurate,quiet auto focus; Great Features; Great Picture Quality

On APS-C digital cameras, things look a bit different though. To achieve the field of view of a normal prime, it takes a lens in the range of 30mm to 35mm, preferably a fast one. Many systems feature a native 35mm f/1.4 lens, however these are usually full frame lenses targeting professional users.