This video will help you fix or repair your stiff zoom ring problems with the NIkon 24-70mm f2.8. Disclaimer: Doing this will void your Nikon Warranty! Only do this if your warranty is expired, Nikon refuses to fix your stiff zoom ring, you need your lens ASAP and dont want to wait to get it back, angry at the world, jumping ship to Pentax. lol. UPDATE*** 02/06/11 – SOLD my Nikkor 24-70 to my nikon buddy who will use this lens more than me, he is a wedding photographer, and the lens zoom ring is still smooth and doesn’t stick or get stuck at all.