I second this. The 550mm lens would be perfect for skittish birds, especially when there is little tree cover for getting closer. If it will be f5.6, as some people have guessed, it might even be affordable (or at least affordable enough that my wife won't beat me over the head with it when I bring it home, since that would cause focus problems due to lens misalignement).

I have an old Sigma 400mm F5.6 that has long since stopped autofocusing and I've been waiting for a lens such as this one for a couple of years.

Thrainn

Þann 3.2.2012 17:31, skrifaði Paul Stenquist:
On Feb 3, 2012, at 12:16 PM, Darren Addy wrote:

Been thinking more about this, and the long long telephoto doesn't
make a huge amount of sense to me on an APS-C camera. A 550mm lens?
That would be a 775mm (35mm equiv) on a crop camera. Anybody see a
huge demand for that?
I want one for my K-5. It would be perfect for shooting small birds.







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