WHEW! I just finished my review of the new Sony 100-400 F/4.5 – and honestly, this lens turned out to be a lot more interesting than I expected. 🙂

On paper, it doesn’t really dominate the other options in Sony’s lineup, but after spending time shooting with it in the field, there were a few things that made me want to add it to my bag.

In this review, I compare it to both the original 100-400 and the 200-600, test it with teleconverters, look at autofocus, sharpness, rendering, and overall field use… and try to answer the big question: is it actually worth $4300?

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