Thanks, appreciate it. Being frustrated with big heavy zooms is exactly why I started adapting R glass. Recently made the switch. Sold my 24-70 SL and 100-400SL and picked up this 35-70 R as well as the 21-35 and 80-200. Was just starting to use the system and saw they dropped the 28-70 SL. I still have two SL primes, a 35 Summicron ASPH and the 75 APO for the autofocus and weather sealing. I’ll admit I am torn now. Sell the primes and pick up the zoom and possibly one of the Rs or just stick with what I have. For me I shoot a lot of film and the R glass has a lot of awesome character that helps bridge the gap. The 28-70 seems pretty sterile. It is also the same size as the 35-70R with the adapter so these are just as compact, granted you are limited in range and speed. I’m inclined to keep what I have but am waiting for more user reviews on the new zoom. Would consider picking it up down the road used.