RobDickinson wrote:
alrac wrote
I want a 200-400mm zoom. Only not like Nikon's at 7 pounds. If it could be lighter and a stop or two faster than the 100-400mm that would be my killer must-have lens. You dont seem to understand how this works. 400mmf5.6 needs to be 72mm , add a stop it needs to be 100mm, f2.8 needs to be 143mm.
That size means weight, unless canon make it out of titanium and DO lenses...
Well if it were to be spec'd as an f/4 lens it can be lighter than Nikon's version--a lot lighter in fact. Look at the new 300/2.8 II and 400/2.8II as examples. Of course, a stop 'or two' faster will not help in this regard (or in terms of cost)