I was lucky enough to have tested the 200-600mm lens out in Turkey at the Gloria Serenity Resort. Perfect conditions lots of sunshine. But how does it compare to a overcast day in the UK. I’m looking at using this lens for my fieldsport photography which is seasonal from September to the end of January. The weather can change from sunny days to blizzard conditions. The day I chose was overcast very grey, subject was a couple of Buzzards I know fly around a farm up the road from me. I was impressed with what I managed to capture. The tracking on the Sony Alpha 7R mkiv was pretty good in some difficult conditions.
Its a camera and lens I would have in my bag.