I have a 3 month old EF 24-105mm f/4L IS II USM that will not focus on either autofocus or manual. When you use auto you can hear lens try to focus and then gets to a point and it looks like you are looking through crystal. Manual ens up same way. This was on my 6d Mll and does same on my 80d. It worked fine a couple of days ago. Was out last night shooting Milky Way using a Rokinon 20mm and IRIX 15mm and they worked fine, but when I put the 24-105mm on this morning would not work. Very frustrating, anybody else ever had this problem?
Have not dropped or got lens wet. I try to take care of my gear but that is no longer an operative statement based on empirical evidence. I have had Canon gear for 40 + years and have never had any problems but I guess there is always a first time. It is under warranty.
