Hi,
I currently use Canon 550D and Canon 400mm f5.6 tele. Primarily into bird photography. I want to upgrade the camera body and due to budgetary constraints (cannot spend more than 1000 USD) looking at buying used equipment. What would be a best upgrade from the below bodies:
1. Canon 40D
2. Canon 1D MarkII
3. Canon 1D MarkIIs
4. Canon 1D MarkIII
How good are the above equipment in terms of noise reduction. Request the feedback from the members.
Thanks & Regards,
Murali