Serious neophyte wrote:
I got it to use on my Nikon D300. I've gotten some great shots with this lens, and a lot of bad ones. I know my D300 is a good, but dated camera. Do I have better options for a birding camera that has fast AF and is good in low light in the $2K - 3K range. Between the Nikon 7100, 610, 750, 810, D3S, which camera is the best value and will meet my requirements? A used D3S is probably the best, and most expensive, and oldest option. Are any of the other cameras a better choice?
Sorry , can't help. Don't know much about Nikon, I have the Tamron 150-600 on my Canon 6D and it works great!