Why you can trust TechRadar
Optical quality is good and the 4-stop optical stabiliser performs well, but it's a shame that Sigma didn't fit an HyperSonic Motor (HSM) autofocus system to the Sigma 70-300mm f/4-5.6 DG OS. As it is, the basic electric motor is quite noisy, but at least it's not too sluggish in operation.
We liked
The 4-stop optical stabiliser makes for consistently sharp handheld shots, and the build quality feels robust.
We disliked
It lacks HSM autofocus and the front element rotates and extends during focusing.
Final verdict
Overall, the Sigma 70-300mm f/4-5.6 DG OS is a good buy at the price, but it's still outclassed by the more expensive Nikon 70-300mm VR and Tamron 70-300mm VC USD lenses.
3 Body Problem's headset is not the VR we want – it's our worst nightmare
Nvidia's fastest AI chip ever could cost a rather reasonable $40,000 — but chances that you will actually be able to buy one on its own are very, very low and for a good reason
Google pulls the plug on the Pixel 6a, paving the way for the Pixel 8a