George in McKinney wrote:
Graham, the Bald Eagle, our national emblem in US, was photographed with the same lens as yours but with
a NikonAF-S teleconverter TC-20EIII. From what I read, Kinko makes a good teleconverter. I have a set of Kinko extension tubes for close up work and their construction quality impressed me. If I were buying a third party teleconverter, it would be Kinko. Get out and practice on the birds in your area.
Have fun,
George