Sorry to disagree with you all here but the RPZ 18-85 has proven to be a much better lens then the Coke 18-100, sharper, better build, and a more consistent look true out the zoom range, RED really did a fantastic job on this zoom, especially at the price point!!
The only lenses that I have found more favorable for me was the Arri/Zeiss LW zoom and the Master Zoom beast, other then them I have found none to equal the RPZ, and I have tested them all, but to each their own, however once again as for sharpness the RPZ 18-85 is sharper then the Cooke 18-100, and it is much better looking too... ;)
