A perfectly adequate and very versatile lens at a very reasonable price. It will produce images suitable for all but the biggest enlargements, or most demanding uses. For anyone with a very high-res sensor that is looking for ultimate image quality a better choice is the new 18-35 from Sigma ...

Sharp enough and with sufficient resolution for most purposes Optical stabilisation Useful focal length range Macro capability Very high image quality across the frame is attainable at moderate FLs when stopped down Pretty well put together from high quality materials

Corner sharpness significantly different from edge; Needs to be stopped down to make full use of the image sensor; Significant CA (purple and green fringing) at wider focal lengths; Not weather-sealed

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...

Excellent sharpness; Very low CA; Low distortion; Well built; Fast focusing; Keenly priced

No weather sealing; Falloff at maximum aperture (although typical for the type of lens

The Sigma 24mm F1.4 DG HSM is another very fast, tack-sharp prime lens in Sigma's excellentt Art series. It exhibits low chromatic aberrations and very little barrel distortion while being able to focus as closeas 25cm.

Want to get photographers' attention? Put "f/1.4" in the model name of your lens. Pair that extreme wide aperture with a highly useful 24mm focal length, arguably best-available 24mm image quality and an attractive, highly functional design and you have a lens destined for success.

Technically there are still a lot of aspects which needs to be covered and it ll take time. But in the interim, the lens works like a dream, absolutely silent while focussing and shots are outrageously sharp.

I ordered this lens with the Sigma USB dock due to worrying about the focus being out of calibration after reading forums talking about this. As it turns out there was no need to worry at all. Focus is spot on on a Nikon D750 SLR body.

Consistent Output; Durable; Quick Focus; Sharp Focus; Strong Construction

Not weather sealed

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

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...

This is more of a preview as I have yet to get my hands on this lens to test it out. I am however very excited about seeing how this lens performs given the quality and sharpness of the previous two prime ART series lenses from Sigma. ....watch this space!

A f/1.4 lens is meant to be used wide open at least sometimes (otherwise an f/2.8 lens is sure to be cheaper, lighter, and just as good). This one does meet expectations. Images shot wide open are pretty sharp already, and above all very "clean".

Sharpness; low aberrations; close focus; contrast; good working against the light

MF not that nice; AF precise but slow; size and weight of course