The same is true of the darkened corners you might see at the lens’ widest apertures, though some people like this effect, too. If you shoot RAW, it’s easy to correct this in image editing software. But if you enable distortion correction in your Sony camera, the distortion will be fixed for you in your JPEGs. Uncorrected you’ll definitely notice straight lines bending outward (aka barrel distortion) on this lens, which can be a fun effect. That means it’s good for up-close macro shots. The M1:2 designation in the name refers to the fact that the lens has a magnification of 1:2 at its closest focusing distance of 4.3 inches. Either lens is a great choice, and which one to choose ultimately comes down to whether you prefer to eke out a slightly wider view (the Sigma) or want a tiny bit more telephoto reach (the Tamron). And this can be minimized in most image editing software if you don’t enjoy the effect. Both the Sigma and Tamron show some distortion at their widest zoom settings, but nothing egregious. Wirecutter’s lead editor for cameras, Phil Ryan, brings his 24-70mm lens with him whenever he can bring only one zoom with him for the day. Both are sharp lenses with zoom ranges that cover most of your needs on an average day of shooting, let in enough light to keep shooting even as the sun sets for the day, and can limit your depth of focus at f/2.8 enough to keep your subjects well isolated (visually) from the background. Low-light fans who shoot full frame and are looking for an everyday lens more akin to our upgrade pick for APS-C above should consider either Sigma’s 24-70mm f/2.8 DG DN Art or Tamron’s 28-75mm f/2.8 Di III RXD.
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