Originally posted by ripit Thanks for the info. Mine is 3.0-4.5. I haven't been able to figure out the difference between the RL edition and the regular ones because they seem like the same lens. If it wouldn't bee too much trouble, could you tell me if yours is par-focal? In other words, if you focus and then zoom, does it stay focused, or does the focus change when you zoom?
My understanding of the RL Edition is that is had a 5 year warranty instead of the standard 1 year - no other difference.
As to focus - it changes very slightly as I zoom either from 200-->35 or from 35-->200. Most of the change occurs at either extreme - but still a small difference, not like some others where the change is significant.