I have a Sigma 100-300mm f4 but it has a focusing issue (not really a problem), when focusing it flickers minutely when focusing.It causes quite a few unfocused photos when I really needed them in focus. I shoot with a Nikon D5000 and so the lens focuses with the lens focusing motor as the Nikon D5000 does not have an in built focus motor.
My question is whether if I bought a Nikon D300 (inbuilt focus motor), would the sigma lens focus better.
Does the inbuilt focus motor over ride the lens focusing motor?
>>> Nikon focusing. How it works?