A competitively priced, digitally optimised lens......

Well priced and sturdy enough lens; full-frame imaging circle

Image quality is not as good as some others

The DG moniker indicates that this is a full-frame compatible lens, while EX indicates that it is one of Sigma's top marque lenses. The lens has an impressive maximum aperture of f/2.8, dropping to f/45 minimum (f/32 on Nikon or Pentax cameras).

Well priced and sturdy enough lens; full-frame imaging circle

Image quality is not as good as some others

I also own the Sigma 150 Macro (which is excellent). Image quality wise, this one is as good, if not a tiny bit sharper. It is small and light, so I always have it in my bag, even if I dont plan to do macro. I bought it also a as a walk around prime that can do macro if needed.

Light weight; Optics: sharpness, contrast, bokeh , color are top notch; AF accurate , price

slow AF (but I knew it wasn't HSM when I bought it...

The first thing I noticed is the ultrafast autofocus. The pictures come out extremely sharp, the colours and contrasts are amazing. I took a few pictures at f32 and the depth of field you get is just incredible, as sharp as can be from the most close object to infinity.

F32! Incredible depth of field! Nice coating on the lens; perfect colours and contrast

None so far :o

A nice lens with decent image quality and reasonable price. As a Macro lens it suits the needs. Sharpness and contrast are on the very good side. Gives a macro rendition of 1:1

Image sharpness is very good even for a tendency for excellence, Contrast is very good, The best point for this lens is its price; Compared to similar products, lenses from the camera manufacturers are much more expensive

Inner construction; The focus limiter is very fragile and might disengage/break from first attempt of engaging it, Lens hood is screw on and whenever attached the lens cap cannot be used, creating an inconvenience, The focusing ring rotates when on AF

The Sigma AF 50mm f/2.8 EX DG macro is a member of Sigma's popular gang of four macro lenses. The new DG ( Digital ) variant features an improved lens coating optimized for digital sensors. It is a full format lens but as usual we'll have a look how it performs on an APS-C DSLR.

Sigma lenses are truly an inexpensive alternative to Canon or other brands higher priced models. The lens is amazingly powerful and precise for only a few hundred bucks. I know that I've wanted a macro lens for a long time but didn't think I could afford one.

Inexpensive excellent macro lens for beginner

Working distance isn't the greatest

Sigma lenses are truly an inexpensive alternative to Canon or other brands higher priced models. The lens is amazingly powerful and precise for only a few hundred bucks. I know that I've wanted a macro lens for a long time but didn't think I could afford one.

Inexpensive excellent macro lens for beginner

Working distance isn't the greatest

I am a professional newspaper photographer and I bought this lens when my old Nikon 50mm bit the dus

This is a very sharp, bright lens; Best of all It's CHEAP

None

As a macro lens that works on my full frame Sony a900, this is a good lens at a good price. Just be aware that the focus motor is quite loud (I was trying to use it in a public library) and as noted in the review, there is quite a bit of CA.

small; light; sharp focus

noisy AF; the CA is as bad as tested