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Originally Posted by ollieholmes
Im needing to get something bigger than my 70-300 lens for my aircraft photography. I realy need something that will take me to 500mm.
I have 2 thoughts, the sigma 170-500.
Or the Nikon 100-400 with a 1.5x tele but i have herd that this lens will not take a tele convertor. If that is true can anyone recomend another lens that will go on my D50 of the same size.
Also i cant decide between the 170-500 or the 50-500 sigma lens.
What are peoples thoughts and experainces on these lenses, or do people have an altrenate suggestion.
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I think the Sigma 170-500 has even slower AF than the Nikon 80-400, and thats saying something.
The Nikon 80-400 will work with a kenko teleconverter but AF will be unreliable, though VR still works.
I'd be more inclined towards leaving off a teleconverter... better to have good sharp shots and crop a little than something iffy but larger.
Sigma 50-500 is good (better than 170-500) but heavy, the Tamron 200-500mm may be best choice, as this is getting very good reviews for sharpness and it's easier to handhold.
Hopefully a real aviation photographer will chip in with some advice.
cheers,
Andy