price of this lense is pretty awesome already, and i got an open-box for even cheaper $. very happy with it. large aperture makes need for flash is not always necessary. perfect for pix of kid around the house. a bit on the heavy end, but that is just an indication of quality lenses.

solid feel; good price

none so far

If you change lenses frequently (as I do) and happen to put this one back in your bag without first attaching the rear lens cap, the rear glass is very easy to scratch as the glass protrudes beyond the lens mount when lens is set to infinity.

Captures nice images

Fatal design flaw

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If you don't know what you're talking about, don't review products, especially if you claim to have a high level of tech knowledge. Earwigy's criticism that the "depth of field is pretty bad" is a ludicrous statement. Without picking hairs, all f/1.4 lenses will have the same depth of field.

Relatively inexpensive, extremely fast prime; Autofocus is internal, pretty fast, and quiet; A little soft wide open, but sharpens up quickly as you stop down; Nice bokeh

A little soft wide open; If you upgrade to full frame, the lens is usless

Recently, I've bought this lens to augment the quality of photos and till yet I haven't found any issues as such!

This lens must weight as much as my Nikon D40 and is excellent for taking candid photos of my 16mo old son. This is the best investment I could have made for my Nikon D40. Since is has HSM, it works with the Nikon D40 which needs to have the motor in the lens.

Huge optics

None

This is a very nice lens for the price. Heaps cheaper than a nikon comparable product, nice and sturdy and produces nice bokeh at open aperture.

Ett bra objektiv om man vill fota mycket i dåliga ljusförhållanden och klarar sig med en brännvidd på 30 mm.

Mycket ljusstarkt (F1,4; Ger bra kvalité i alla ljusförhållanden så man slipper dra upp ISO; Kompakt och litet objektiv med gedigen konstruktion; Personligen föredrar jag att fota med min Sigma 30 mm än tex Canon Ef 50 F/1,8; inte bara för att det är ljusstarkare utan gör att jag finner att 30 mm är

Fast brännvidd; något vissa kan tycka är jobbigt; Svårt att autofokusera i svagt ljus; man måste hitta en ljuspunkt att fokusera på; Brus i höga ISO

I wanted a crop sensor lens that was close to a 50 mm full sensor. I read a lot of reviews, then settled on this lens. I'm a newbie and and still working on my ideal stills but this lens rocks for video

Durable; Easily Interchangeable; Excellent Field Of View; Great for Video; Lightweight; Love The Sharpness

Slight Auto Focus Issues

Great prime! This has been on my 7D at least 90% of the time since I've purchased it. Abes has new the version with Sigma's new finish which has been working great, although I did have to set MA to -3.

Fast / accurate auto-focus; Nice Bokeh; Rugged; Strong Construction

Chromatic aberration