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.

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

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.

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.

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

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.

Last year I made the switch to full frame and parked Sigma's 50mm F1.4 Art lens on my 5Diii. I thought full frame was the most amazing thing, and I could never go back. Then I started doing a little bit of video work, so I dusted off my SL1 to use as camera 2.

The 30mm f/1.4 DC HSM Art is another solid entry in Sigma's prestige lens line-not the finest glass the company has to offer, but a marked improvement over the older (if cheaper) 30mm f/1.4.

Purchase use. Very good from F/2.2. Front focus 1.4-2.0. After 2.2 have litle back focus. From f4 focus is perfect. Work very well in life view with Canon 60D. Mutch better than Canon 50/1.8.Very happy.

The Sigma 30mm F1.4 DC HSM "Art" is a fast prime lens designed exclusively for APS-C DSLRs; it's of particular interest to us because its "normal" field of view corresponds roughly to that of a 50mm lens on a film camera.

Fast F1.4 maximum aperture; Convenient focal length on APS-C; Beautiful bokeh; Excellent center sharpness; Compact and easy to hold; Minimal vignetting at F2 and above; Resistant to flare and ghosting; 4-year warranty (USA; Very affordable

More distortion that we'd like to see in a premium prime; Purple fringing near edges/corners; Low contrast wide-open; Somewhat heavy given its size; Average corner sharpness; Not weather-sealed; Sluggish autofocus