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

reviewer#2289 date: May-9-2007
sharpness: 4
color: 5
build: 4
distortion: 4
flare control: 5
overall: 4.4
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 MP; 24MP24 MP; 36MP36 MP; 42MP42 MP; 61MP61 MP
ownership:I own this lens
compared to:18-70 kit lens at wide end (a bit unfair)
price paid:L420 (new)
positive:Colour, lack of distortion when used carefully, fabulous on a film body.
negative:Large protruding front element - be VERY careful. Extreme variable quality, test lens thoroughly and do not hesitate to return.
comment:The rating I've given is for my 3rd example of this lens. The 1st was soft on the right side and sharp on the left - to a significant amount that was easily visible when viewed on a monitor without any "pixel peeping". After returning this lens I was sent another; and this was the exact opposite - soft on the left, but very sharp on the right.

At this point I contacted Sigma GB and under their instruction sent images and the lens back to them.

The 3rd lens I'm relieved to say is fine and is good to handle, even though the zoom ring is stiff and the CA is slightly worse than the others, you can't win 'em all!

My message is simple; if you get a good example it's great - but as it's designed for full frame it should be on APS-C! Make sure where you buy it from has an excellent reputation for returns!! You hopefully won't need it but I also thought that!

Having now used the lens on a A900 it has come into it's own - just mind not to get your feet in the frame. The softness at the edges can be a problem, but stop down and it improves; and like all W/A lens, you need to work at it to get decent shots - this will deliver like no other!

rating summary

lens image
  • total reviews: 49
  • sharpness: 4.03
  • color: 4.39
  • build: 4.49
  • distortion: 4.49
  • flare control: 3.63
  • overall: 4.21 - Home of the alpha system photographer
In memory of Cameron Hill - brettania