The Panasonic 16-35mm f4 PRO is very nice, but it’s not outdoing Sigma’s 14-24mm f2.8.

When we called the Panasonic 16-35mm f4 PRO lens in for review, we were pretty excited. Panasonic has done a positively stellar job of designing lenses for the L mount system. But when looking at prices, I was scratching my head. One would think the Panasonic 16-35mm f4 PRO would be the affordable wide-angle zoom amongst the lineup. But the truth is it isn’t. Sigma’s 14-24mm f2.8 is a bigger lens that lets more light hit the sensor, and it’s more affordable than the Panasonic 16-35mm f4 PRO.
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https://www.thephoblographer.com/2020/04/13/review-panasonic-16-35mm-f4-pro-a-great-cityscape-lens/