For a full review of this lens plus a comparison to the Sigma 18-35mm f/1.8 go to: https://filmdaft.com/buying-guide-pan...
Just a quick test I did with the Panasonic Lumix G Vario 12-35mm f/2.8 mark II in order to test its performance in bad weather and low light. Timelapse made with the Panasonic GH4.