Douglas Boyd
Leading Member
The 100-300 is substantially lighter and smalller than the 100-400 and produces very good images. Purple fringing is a rare issue and can be mostly corrected. If carrying a two lens kit while walking, I would prefer to carry something like 12-60 plus 100-300 and reserve the 100-400 when I really know I am going to need the extra reach, for example, on safari.