avkomp wrote:With birds especially they go where they wish when they wish and the photographer will rarely know with certainly exactly where it will go.
Actually, that's rarely the case.
Butterflies, yes, absolutely.
But take some time and watch the birds.
Seriously: observe them. I do at Lindy's, quite frequently.
DO so, and over time you'll see that they follow certain patterns, flying from a to b to d to c.
Over a short period, it might certainly appear to be random, but if one is claiming to know and understand their tools, one should also surely understand one's subject.
And again - and let be perfectly bloody frank about this - the only way that one can complain about the focussing speed of the 80-400 is if they simply do not understand how to use the damn thing!
Yes, it's slower on a D70 than it is on a D2X.
And you're comparign a $1500 body with a $6000 body, so what the hell do you expect?
And yes, it's slower than a 70-210 VR.
But the 70-210 has not got the reach - never had it, and never will have it, and it stioll costs about twice the price of the 80-400.
And it weighs a fair bit more too, which only introduces a whole host of new issues for you to address.
So, learn what the lens's features and limitations are.
And learn to use it properly.
And if you're not prepared to do that, then sell the bloody thing and buy a 200-400 for a mere $10,000!
But I''ll tell you now that even with that lens, with it's speed, range and fast aperture, you'll still be missing the same bloody shots, because you're failing to go back to the basics, and learniing to use your tools properly.
I find the 80-400 slow in focussing compared to others I have used.
Sometimes this has caused me not to get the shot because the target cleared off in the shot time between target acquisition and focus lockup.
As such I would recommend a faster lens for action sports or birding.
See above.
My belief i that you're simply not using your gear correctly, and I doubt a faster lens, or a faster camera, is the correct answer. With respect, I think you're providing excuses.