04-11-2009, 02:43 AM
Some Sony lenses are Zeiss designs, some Minolta, some Sony and some Tamron.
The 70-200 Sony is an excellent lens, on par with anything from Canon or Nikon. AF should work excellent with a 1.4x giving you a 320mm F4 zoom and a 2x giving you 400mm F5.6 and working AF, but probably not as well as a regular 400mm F5.6 lens. Optically your going to give up a bit with the 2x converter.
The 70-200 Sony is an excellent lens, on par with anything from Canon or Nikon. AF should work excellent with a 1.4x giving you a 320mm F4 zoom and a 2x giving you 400mm F5.6 and working AF, but probably not as well as a regular 400mm F5.6 lens. Optically your going to give up a bit with the 2x converter.