dont like push-pull zooms because of the risk of dust into the camera
It's not the push-pull, it's the fact that the zoom extends. Rotating zooms that extend also move lots of air - hold a lens like the 24-105mm with the lens mount up to your face, and zoom in and out. Fully internal zooms, like the 70-200mm series, do not move air like that. However, to design a lens like the 100-400mm as an internal zoom would eliminate one of the key benefits of the lens, it's (relatively) compact size when retracted.
Has anybody heard if there is gonna be a mk II version on this one. Me myself dont like push-pull zooms because of the risk of dust into the camera
Yes, I recently read that a 100-400mm MkII was due out very
soon. But then, I read than in a POTN post from 2004.
Seriously, despite rumors to the contrary, I would not be surprised if Canon doesn't update this lens any time soon, if at all. The new 70-300mm f/4-5.6L IS lens is
Canon's update/replacement for the 100-400mm. The 100-400mm lens was designed when all cameras were FF (film), and for the new 70-300mm, Canon has clearly stated that their target market for that lens is the APS-C owner, where the lens provides an equivalent 112-480mm, i.e. longer than the 100-400mm on the bodies for which it was deisgned.
I'd certainly like an updated verision of the 100-400mm, but I'm not holding my breath (and in fact, I'd like an updated 400mm f/5.6L prime with IS even more).