I like the Lumix here the most, but the Sigma and Nikkor are looking pretty nice right behind it. These are easily the least bad of all the f/2.8 corners we’ve looked at, which makes sense given we are at 70mm.

In terms of features, the Sigma 24-70mm f2.8 DG DN Art offers almost everything that you need from a standard zoom lens. His expertise with equipment doesn’t end there, though. He is also an encyclopedia when it comes to all manner of cameras, camera holsters and bags, flashguns, tripods and heads, printers, papers and inks, and just about anything imaging-related. Of course, on the L-mount you don't have Tamron's offerings to consider, but it's a similar story to the G Master when comparing to the Panasonic 24–70mm F2.8, and even more so against the even pricier Leica lens. Early copies had poor dust sealing. I exercised the 4 year warranty and sent my copy in a few months ago and they upgraded the seals and cleaned the dust out as a warranty repair. The Panasonic Lumix S PRO 24-70mm f2.8 works on Leica, Panasonic and Sigma L-mount cameras. It is larger and heavier than the Sigma and costs 2500 EUR / 2200 USD.

Update History

Should standardise the process and turn off lens correction. "whenever possible" is easy, convert the raw files to DNG, then strip the correction.

As usual I’ll have a look at the technical data of the new Sigma 24-70mm f2.8 DG DN Art first. I’ve rated the features with a [+] (or [++]), when it’s better than average or even state of the art, a [0] if it’s standard or just average, and [-] if there’s a disadvantage. For comparison I use the Sony 24-70mm f2.8 GM, the Tamron 28-75mm f2.8 Di III RXD, the Panasonic Lumix S PRO 24-70mm f2.8, and the Nikon Z 24-70mm f2.8 S. For short I simply use “Sigma”, “Sony”, “Tamron”, “Panasonic”, and “Nikon” in the comparisons below. So at the end of the day, we can’t fault Sigma for not including IS in this lens. The Sony version doesn’t have it either, and the inclusion of IS generally increases the overall price of a lens. Ease of use in the fieldBut, the bigger issue is, if this type of under-the-hood raw profile correction becomes more and more the norm, (since, let's be honest, almost everybody still uses Lightroom or Capture One) ...are lens manufacturers going to try and get away with more and more "hidden" corrections?