Out with the RF 600mm f11 in a light rain this afternoon to see how it shoots after shooting a lot with the 100-400mm, it impressed again with some nice shots of a Blue-Tailed Bee Eater, one of the most photogenic birds in these parts.
Without harsh light, the lens proved to be decent with feathers at middling distance. But with use limited by a long-ish MFD, and with slower and less certain focus acquisition, the 100-400mm with 1.4X gets the nod. The 600mm and 800mm plastic fantastics seem to be yet two more of the “go somewhere and sit” kind of lens.
And so far, I don’t mind walking . . .