In a thorough, and thoroughly entertaining review, Amber Baird of Eyenamics describes their experience using the new G Master lenses for shooting weddings in 4K. 

"We decided to put our new gear to the test at a real wedding. As far as sharpness goes, we were absolutely blown away with this lens. We have used the Canon 85, the Rokinon 85 and even the Zeiss Batis 85 and we could tell this lens is visibly sharper without even pixel peeping.

"We started pulling still frames from the video clips and they looked like extremely high resolution photographs. We were blown away. They were so beautiful. The sharpness on both of the lenses was spot on." -Amber Baird, Eyenamics