Sigma 50mm F1.4 DG HSM ART A-mount lens review by whisperer

reviewer#36824 date: Apr-11-2017
sharpness: 5
color: 4
build: 2
distortion: 5
flare control: 5
overall: 4.2
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 used to own this lens
compared to:Sony 50 1.4
Minolta 85 1.4
Minolta 28 2.0
price paid:760€ (new)
positive:Tack sharp when properly focused, even wide open.
negative:FOCUS ACCURACY
Heavy
Autofocus could be faster
comment:I bought this lens for shooting wide open on my A99, which I can't with the old Sony 50 1.4. After the first few test shots I noticed many photos weren't track sharp. After many test shots in various lighting conditions, micro-adjustment, comparison with Sony 50 1.4 and Minolta 85 1.4 lock-on, I was sure it wasn't locking focus accurately. I even switched the AF on the A99 to slow and waited a fraction of a second longer for it to focus (after the beep), it improved accuracy but was still getting some missed shots in all sorts of conditions.
I finally compared to a Sigma Art 50 on a friend's Canon 6D and it was flawless in his.
So I returned the lens to go for the Zeiss 50, with the advantage of having a much wider AF area on the A99 II.
As a professional I can't rely on a lens that doesn't give me confidence I can get the shot.
My build rating reflects only on the AF accuracy.

rating summary

lens image
  • total reviews: 8
  • sharpness: 5.00
  • color: 4.88
  • build: 4.38
  • distortion: 5.00
  • flare control: 4.75
  • overall: 4.80
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