Quote Originally Posted by Fouad
I will be using the lens for birds, flowers, landscape, non formal portraits, zoo, park, etc.
  • birds, zoo, park: 300mm f/2.8
  • flowers, landscape, portraits, etc.: 200mm f/2



Now all you need to do is decide which one is more important to you. (FWIW, you'll need at least 2X TC to do birding with the 300mm f/2.8.)