Reviews and Problems with Sigma 15-30mm F3.5-4.5 EX DG ASPHERICAL
Showing 1-7 of 7
31 May 2009
Summary: I am so far, pleased with the lens, I recently got a Canon 5d, so I had to get rid of my Sigma 10-20 and replace it Wide angle lens that would work on a full frame. Since the Sigma 12-24 was out of my price range I settled with this one. Personally, I think this lens is as sharp as the Sigma 10-20 I had. Also, it seems to me as sharp as the Canon 17-40L that I borrowed. The auto focus is quick and actuate, but kind of noisy.
Summary: Ideal for DX, but not so good on FX. Normally, when you shoot wide angle, you're interested in the whole image sharpness and not only the center. This lens did not quite work out for me on my D700 because of the corner softness. I ended up replacing it with the new Nikon 14-24mm.
Summary: I decided to buy this lens to add an ultra wide angle to my kit. I'd rate the image quality as average to good overall. The biggest problem (and ultimatley the reason I decided to re-sell) is the lens size. It's just very big and heavy.
Conclusion: Compare to the examples I tested of Canon zooms in a similar range, this lens was sharper so I bought it. Use in the real world taught me that it suffers awfully from blue circular flare marks - my first copy was so awful for it I returned it for another. The second example didn't suffer as badly but the zoom ring sounded like it had something grinding inside it, so I returned that one too. The third had flare again, but not as bad as the first.
Conclusion: Most reviewers report this as a sharp lens. However, in my experience, its sharpness is only average--not any better than the Canon 300D kit lens in the range they have in common. Even on a 1.6 crop factor camera, edge sharpness deterioriates noticably at wider aperatures. That has been my biggest disappointment. Flare can appear as blue circles/ovals that often become more prominent as you adjust levels in PS, and can be hard to edit out.
Conclusion: Bought this lens a while ago, and though the 15mm is great, I find that the range of the zoom is not great enough to warrant it being a zoom lens - You'd be better off getting a 15mm lens, and a 28mm f/1.8 or something. The Image quality of this lens is good, and produces sharp results. However, flare is a HUGE problem for this lens. You get flare if you shoot into sun, if there are bright lights anywhere in the frame, if there's bright lights anywhere near you etc.
Pros: Good value for money, Sharp lens, Wide
Cons: Flare, Flare, Flare, Flare. Size of the lens, Range of zoom
Conclusion: The first thing that impressed me about this lens was the construction. It's really solid and feels good to hold. I wanted to get a real wide angle zoom and retire my 24/2.8. I bought this used for around US$300 which was a pretty good deal. The first thing I observed about the optics was the color saturation. It was excellent, probably as good as my primes.
Pros: Superb construction and solid feel.
Cons: Not so hot optics, weird AF/MF switching mechanism, massive flare.