Low light … is always happen Rainforest here … think most the people consider this lens will have same thoughts 1. price – OK .. cheaper better la … 2. 800mm zoom at 2kg .. Good focal length + weight 3. F9 at 800mm !!!! what F9 !!! so dark how ! 4. Image quality … Continue reading First Full frame Zoom 800mm – RF200-800mm f6.3-9 IS USM – Low Light concern [update 20231231]