Compared to the last incarnation, AFS 80-200mm f/2.8 D, the old behemoth 80-200mm f/2.8 AIS might not be sharper however it does suffer much less from vignetting. Plus it is even better for IR photography
Not the slightest trace of a hot spot even with the lens stopped all the way down. This is unusual to say the least!!
Both are now on the [too] heavy side for my current liking. Feminisation has its drawbacks, like everything else in this world. Good on me the Sachtler tripods are lightweights, though.