leland gaunt

From last year with 100-400mm.

Hi Jozzef, same with my one. The pictures at 16mm are not as sharp, as they should be. I given the lens back. Others say it is a good universal lens. Maybe some has problems from production side?

Dust is a problem when you change lenses often. I have clean my sensor chip today, because of too many black dots in the sky. For sure no UFOs, all parts of dust. I use the sensor cleaning system from the camera, but from time to time is needed to do this. With my old 5D II is was not so often needed. But this is no argument to going back to DSLR.