This lens is the latest addition to Sigma's 'Art' line of lenses that promise excellent optical quality and increased creative options thanks to a fast f/1.4 maximum aperture. Being one of Sigma's top of the range lenses, it sports a hypersonic focusing motor, brass lens mount and build quality...

: Sony's A99 has the best high ISO ability of the three cameras here. It's a no brainer for event photographers.

Sigma's Art range of prime lenses is among the most sought after on the market. Not only do they offer good value for money, they also display stunning optics and excellent design. The 24mm, which works on full-frame or crop sensor Nikons, Canons and now Sonys, features 15 elements in 11 groups.

Sigma keeps on rolling out more "Art" (professional grade) series lenses - obviously with quite some success as you can also conclude from our previous reviews of Sigma Art lenses. Slowly but steadily Sigma has gained quite a reputation in the professional community as well.