1 asferico, 3 a bassa dispersione, 2 a bassissima dispersione
The Digital Picture There are very few lenses as sharp as this one at f/1.4. [...] Having an f/1.4 aperture is extremely desirable. While no 105mm f/1.4 lens is going to rule the bokeh world, the Sigma-self-dubbed "Bokeh Master" does have the ability to create a very strong (and high quality) background blur at its very useful focal length. [..] I experienced some inconsistent AF accuracy on my Canon 5Ds R test camera and while that is an issue, you may not encounter the same.
Dustin Abbott There’s no question that the extreme size and weight of the 105 ART will be off-putting to many, but those with a little extra arm strength will be rewarded with an exceptional portrait lens. [...] The autofocus works well, the images look fantastic, and the build level is high.
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