[robski]

Originally Posted by ruchai

My 80-400 Nikkor and Nikon D50 seems to work well at f:5.6 and ISO 400.

I should hope so the lens is double the price of the Sigma 170-500.

The top spec lens do perform better than the cheaper lens at a wide setting.

I must confess I am still a novice as I only took up photography 30 years ago. I am glad those old days of trying to keep the chemicals warm in my darkroom during winter months are long gone. Now bird photography I am wet behind the ears. I've managed a few passable shots since taking up this aspect less than 12 months ago.