Sigma 12-24mm F4.5-5.6 EX Aspherical DG A-mount lens review by RD

reviewer#4315 date: Nov-3-2008
sharpness: 2.5
color: 5
build: 4
distortion: 5
flare control: 5
overall: 4.3
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 own this lens
compared to:Zenitar 16mm
price paid:
positive:-Wide angle with little vertical line distortion
-Nice build, light weight
negative:-Too soft on both sides of the full frame Alpha 900, looks ok on Alpha 700 APC images.
comment:On the Alpha 900, the image is very soft on the edges. This lens did no better when choking down the aperture unlike the Zenitar 16mm. Zooming in to 12mm or out to 24mm still yielded very soft edges. I am no expert, but I would estimate 5-6 blur units at least for the far right/left 10% of the image. Not acceptable.

It looks much better on the Alpha 700 where the soft edges are just outside the APC-C frame. I suspect many of those who get this lens for future-proofing might be in for a disappointment when they look at this lens on a full frame camera.

I sent the first back to BHP photo RMA for exchange, I will update this post when I get the replacement.

rating summary

lens image
  • total reviews: 49
  • sharpness: 4.04
  • color: 4.39
  • build: 4.49
  • distortion: 4.49
  • flare control: 3.65
  • overall: 4.21 - Home of the alpha system photographer
In memory of Cameron Hill - brettania