I have the 645n and two zoom lenses. I have the 80-160mm and the 45-85mm zooms. On the front of the barrel of the 80-160 there is an opening that gives access to a "wheel" or "dial" (whatever it may be called) that allows the threaded filter ring on the very front of the lens to be rotated even while the tulip-shaped hood. The 45-85mm zoom lens does not have this feature. I don't understand why one lens has it and the other does not, nor the choice for which one does. It seems to me that the wide angle lens would probably be used more for landscape pictures where be able to rotate a polarizing filter would be a great advantage without having to remove the hood to do it. Does anyone know anything about this feature and why it was done this way?
Glen O'Neal
