You can push-pull the new model, but you have to grasp it at the end, which is awkward.
For me the moniker "Push-pull" is shorthand for "push-pull while maintaining the perfect balance point". That's not possible with the new lens.
Canon creates it's best action wildlife & BIF camera in the 7D II, then at close to the same time it releases an upgraded 100-400 lens, taking away that which made the original version so fast in the field.
How did this happen? Physics and logic make any argument about the speed & efficiency between the two systems a waste of words. Perhaps Canon's right hand didn't know what the left was doing? Maybe they need better advisers, or the ultimate decision maker needs to be reassigned to the mail room.
Just my humble opinion.









