Sigma 28-70mm F2.8 EX Aspherical DF A-mount lens review by snigelben

reviewer#904 date: Jun-10-2006
sharpness: 4.5
color: 5
build: 5
distortion: 4
flare control: 4
overall: 4.5
tested on:
  • film camera:Film camera
  • APS-C: 6MP6 MP; 10MP10 MP; 12MP12 MP; 14MP14 MP; 16MP16 MP; 20MP20 MP; 24MP24 MP
  • full frame: 12MP12 MP24MP24 MP36MP36 MP42MP42 MP
ownership:I have experience with this lens
compared to:KM 28-75 f2.8 D
price paid:
positive:Sharpness, build quality, price
comment:Compared to the 28-75, it feels a bit more solid. When it comes to sharpness, they are very similar. Both are very sharp stopped down, and produce usable images wide open. The Sigma is a bit heavy for my 5D, which knocks the combo slightly out of balance.

F2.8 performance:
At 28 mm the Sigma is excellent, noticeably better than the KM, while the latter is better on the tele side. The Sigma stays really impressive all the way through 50 mm, but at 60-70 mm, it becomes less brilliant. The 70 mm 2.8 shots will require some post processing if you want to make large prints, but given the price, that is a pretty reasonable compromise in my opinion.

F8 performance:
Very good. I don’t imagine you can get more detail out of a 6 mp sensor.

rating summary

lens image
  • total reviews: 11
  • sharpness: 4.41
  • color: 4.82
  • build: 4.45
  • distortion: 4.27
  • flare control: 4.09
  • overall: 4.41 - Home of the alpha system photographer
In memory of Cameron Hill - brettania