Originally posted by ioszhka dgaies, you said you had the tokina 80-200/2.8 and the 70-300VR. Which is the better one in terms of build quality, autofocus speed and IQ?
They're very different lenses. From what I recall Tokina 80-200/2.8 was quite heavy, but very well built and solid feeling. The 70-300VR is a lot smaller, lighter, has quite a bit more plastic ans isn't quite as well built. But we're talking about a constant f/2.8 telephoto zoom as compared to a consumer zoom, so the weight and build differences are to be expected.
I can't really compare AF speed as the only time I shot with the 80-200 was on Pentax (a K-7, I think). The 70-300VR was shot on my D700. Needless to say the AF on the 70-300 was significantly better than the 80-200. How much of that was the lens and how much was the body? Probably a lot of both. Without trying an 80-200 on a Nikon I couldn't say for sure, but I have a feeling the AF-S 70-300 would be quicker in terms of AF than the 80-200 even on the same body.
IQ, again, hard to say from the limited amount I shot either lens. If you stop the 80-200 down to the same apertures you'd be at with the 70-300, it wouldn't surprise me if the IQ was better. That said, I think the IQ of the 70-300 is quite good for the price.
I guess overall if I was choosing between the two lenses, I would only select the 80-200/2.8 if you know you needed/wanted the ability to shoot a fair amount between f/2.8 and f/4. Otherwise, I'd probably go for the lighter, faster AF 70-300VR with more range over the 80-200.