More expensive zoom question

Or you could get a 400mm f2.8, a 1.7 TC-E and a D800 and have 400mm f2.8 FF, 600mm f2.8 cropped to 15+ Mpix, 680mm f5.6 FF and 1020mm f5.6 cropped to 15+ Mpix for around $12,500






and get a cheaper car.
 
or you could get a 300mm 2.8 and have a lighter cheaper setup then both, get a tc20e iii teleconverter and have 600mm @ 5.6
 
When mounting a 300 2.8 & tc20e iii, will the displayed aperture be correct or do you have to do the math to figure out the actual aperture?
 
I notice they say it VR rated for 4 stops of shake reduction - by my math that would make it hand-holdable at 1/50s using the 1/focal length rule. That's pretty impressive, I struggle to get sharp shots at 1/50 at 300mm on my canon 70-300 IS lens...
 
Just looking at the page for that 800mm lens, wouldn't say it looks very sharp (to me at least) at all. and yeah, I know it's at 800mm, but still for that price I'd expect much sharper than this:

sample3_l.jpg
 
This is likely to be popular with the birding crowd, cricket (the sport), surfing, olympics....

In terms of expense, it's not out of line when compared to a well corrected top of the line triplet refractor of that aperture.
 
I notice they say it VR rated for 4 stops of shake reduction - by my math that would make it hand-holdable at 1/50s using the 1/focal length rule. That's pretty impressive, I struggle to get sharp shots at 1/50 at 300mm on my canon 70-300 IS lens...

extremely heavy lenses don't vibrate much so I doubt the vr is that useful. Especially considering that u need at least a monopod to shoot that lens.

I have a 600mm f5.6 and I doubt vr would give me much help. I can shoot it on a monopod down to 1/50 and get sharp photos.
 

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