>>4153648the strange part is wanting an extreme telephoto and not bothering with ultra wide while wording it like landscape is the most important. Maybe OP misspoke and wants to do birding with some casual landscape. In which case I understand the lack of wide angles and wanting all the reach.
If OP really wants a light kit for landscape and general casual wildlife he’d look at the 8-25 f4 and the 45-150 f4. 8-25 is basically purpose-made hiking lens and has semi-macro capabilities too. The whole kit with body would weigh less than the 100-400 on it’s own.
