imagemeister wrote:
One of the very, very, attractive reasons for owning this lens is going to 600mm f5.6 .......RARELY do I take the 2X off of mine - only when I need F4 (1.4X) or 2.8 apertures .....using mine with a dedicated 50D.
I appreciate your input and will consider it.
Since I got the 5D I haven't used my 50D though I keep it nearby with a 70-200 2.8.