cdvideo wrote:
I have the series one 400 2.8 and it is quite heavy to hold after a few minutes. I have a 2x but have not been happy with the results, I have tried to re-calibrate the camera with the 2x on the lens but is still a bit soft and it does slow down the focus speed.
My avatar is my tripod with a device I built for managing the 400 lens for BIF It helps a lot as it allows me to track the birds flying toward me, and make it a breeze to hold the lens over my head as they pass by.