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David Behrens | profile | all galleries >> My Equipment >> Sigma 15-30mm f3.5-4.5 EX Aspherical DG DF tree view | thumbnails | slideshow

Sigma 15-30mm f3.5-4.5 EX Aspherical DG DF

When it comes to cost vs benefit the Sigma 15-30 delivers. I doubt you can find better performance for the cost. Its somewhat soft in the corners shooting with some (easily correctable) chromatic aberration when shooting wide open at f/3.5 but from about f/7.1 onwards it provides sharp pictures with its best corner performance on full-frame cameras from f/9-22. The reviews show this lens sharper than its 12-24mm brother and my 15-30 is much sharper than my Canon 17-35 f/2.8 L.

Its 15mm gives a wonderful ultra wide angle. However, its weakness is flare especially at 15mm, where any sunlight that hits its protruding front element results in flare.

Here are some representative samples from f/4.518 as well as two examples of lens flare - all taken from full-frame cameras.
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f4.5 at 15mm.jpg
f4.5 at 15mm.jpg
f8 at 15mm
f8 at 15mm
f11 at 15mm.jpg
f11 at 15mm.jpg
f11 at 23mm.jpg
f11 at 23mm.jpg
f11 at 15mm
f11 at 15mm
f11 at 15mm
f11 at 15mm
f14 at 15mm
f14 at 15mm
f14 at 15mm
f14 at 15mm
f16 - 15mm.jpg
f16 - 15mm.jpg
f16 at 15mm.jpg
f16 at 15mm.jpg
f16 at 30mm.jpg
f16 at 30mm.jpg
f16 at 21mm
f16 at 21mm
f16 at 15mm
f16 at 15mm
f16 at 15mm
f16 at 15mm
f16 at 18mm
f16 at 18mm
f16 at 15mm
f16 at 15mm
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