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The new Canon RF 16-28mm F2.8 IS STM ultra-wide zoom lens is a smaller and cheaper alternative to Canon's pro L-series lenses ...

Thereafter, we can measure pincushion distortion, +1.23% at 24mm and +1.54% at 28mm. Pincushion distortion in a wide-angle lens can look a bit odd, but it is not too severe and might well go ...

For this review, the lens was tested on a Pentax K-1 using Imatest. Barrel Distortion is present throughout the range, measuring -3.32% at 20mm, -2.39% at 24mm, -1.46% at 28mm and -0.63% at 35mm.

It features a bright maximum F2.8 aperture across its entire 16-28mm range, and is a much more compact and affordable option for enthusiasts than Canon’s pro RF 15-35mm F2.8L IS USM lens.