After taking my Sony A7III and Sony G 70-200 f/4 telephoto to a couple of hiking and camping trips, I'm looking forward to improve my equipment to get more into wildlife photography.
So I need longer reach while keeping dimensions and wheigt as low as possible, and of course trying to get as best image quality and autofocus effectiveness as possible. It must also keep at least basic moisture and dust protection, as i'm using it in nature.
I am between selling my 70-200mm f/4 and getting a Sigma 100-400mm f/5-6.3 DG DN OS, which seems to be a rather compact and light lens, or keeping the 70-200 f/4 and buying a 2x teleconverter.
Which option will better fit my needs?
edit: other possible choices are also welcomed
This is an example of the kind of photos I want to achieve more oftenly:
Sony A7III 70-200mm f/4 - 1/1250 sec. f/11 ISO1000 lens length:200mm focus distance:5.82mts