Sigma has launched two fast-aperture prime lenses for Canon mirrorless cameras; the 16mm F1.4 DC DN Contemporary and 23mm ...

Central sharpness is excellent from f/1.4 all the way through to f ... with low figures that are a credit to Sigma for such a wide-angle lens. Chromatic aberration (CA) is the lens' inability ...

Best overall The best lens for astrophotography overall The Sigma 14mm f/1.4 DG DN Art lens is great for astrophotography thanks to its speedy autofocusing, but it can handle hybrid shooting as well.

To complicate matters, some European brands (including Hasselblad, Voigtlander, and Zeiss) use a comma rather than a period ...

That was until very recently, in July earlier this year third-party lens manufacturer Sigma got the green light to release its 18-50mm f/2.8 DC DN C, and followed up with the more recent 10-18mm f ...

Since Leica and Sigma also use the L-mount, it means that Panasonic camera owners have additional flexibility. The lineup lacks some common options, like a 300mm f/2.8 lens, but those may not be ...

If it is sharpness we seek, then this is our lens. Centrally, sharpness is excellent from f/1.4 right through to f/11, and still very good at f/16. The edges are exactly the same, excellent from f ...

Both lenses offer popular focal lengths with fast f/1.4 apertures, ideal for working in low light and for creating shallow depth of field portraits – I personally relied on a 35mm f/1.4 Sigma ...