Hi all,

Recently purchased the Nikon 70-300mm VR and have started bird photography with it. Ive come to enjoy shooting birds so much that I need a longer focal reach. I dont have the budget for Nikon primes so Im looking at the Sigma 150-500 (or maybe a Tamron 200-500).

Ive read in some reviews that the Sigma 150-500 got some issues with AF and that the stabilization system is noisy. Can anyone who owns this lens please give feedback? Btw Im a D90 user.

Thanks so much.