Quote Originally Posted by Harfang View Post
I'm looking into buying either an EF 300 f/2.8L IS II or the new EF 400 f/4 DO ID II with an EF 1.4X III.
Love the 300 with it's wide aperture but the 400 is lighter and longer but I have read a lot of bad reviews of the old 400 DO.
I have not yet made my choice.
Which do you think would be more useful...an extra stop of light or a 33% longer focal length? The weight difference isn't much. May want to wait for Bryan et al. to review the 400 DO II, but looking at Canon's MTF charts the MkII is a big improvement over the original 400 DO.