I sent my 5D4 to Costa Mesa for a sensor cleaning and it came back with dust all over it and a scratch at the bottom of the sensor. They would not take responsibility for it and I ended up accepting their offer to cover 60% of the cost to replace the...
I have the 16-35 F4 L and have no complaints. I use it for landscape and Milky Way photos. The photos are clean & sharp with vibrant colours. I can't speak on the F2.8 as I have never used it.
