for up close things and macro 70mm macro (although I have a 105mm on order and that may well wind up being my favorite for macro)
For travel 18-200mm
There isn’t one single lens, but the 200-600 is pretty much always on my full frame, and the 70mm macro is almost always on my aps-c. For travel it’s usually the aps-c with the 18-200mm.
If I had more money my answers might be different.
Depends on what I’m doing.
For fieldwork and most wildlife 200-600mm
for up close things and macro 70mm macro (although I have a 105mm on order and that may well wind up being my favorite for macro)
For travel 18-200mm
There isn’t one single lens, but the 200-600 is pretty much always on my full frame, and the 70mm macro is almost always on my aps-c. For travel it’s usually the aps-c with the 18-200mm.
If I had more money my answers might be different.