Best zoom lens upgrades

Much bigger than most lenses, and at more than twice the weight of some, the Tokina AT-X 16-28mm f/2.8 PRO FX is a chunky lens. That's because while other lenses are designed solely for use on cameras with APS-C or Four Thirds sensors, the Tokina is fully compatible with full-frame cameras.

Street price : around £895

Read the full Tokina AT-X 16-28mm f/2.8 PRO FX review

Image tests

Sharpness Test

Best dslr zoom lens upgrades: 8 tested

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Centre sharpness at all focal lengths is about average. However, sharpness drops towards the middle to edge frame.

Fringing test

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The Tokina shows little visual signs of fringing at any focal length. There's a slight blue fringe towards the edge of the frame, however.

Distortion test

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There's slight barrel distortion at 16mm, but the effect is minimal. Throughout the rest of the focal range there's little distortion.

Image test verdict

Overall sharpness for the Tokina lens is average, and while there's a drop towards the edges it isn't as dramatic as the others in the test.

Score: 3/5