I rented a zoom lens to try out a GH4 and I have noticed that when I start to zoom out on it and then point the camera down the zoom will keep sliding down on it's own. The lens in question is a 14-140 Lumix f/3.5-5.6. My question is whether or not this is common problem with zoom lenses and if there are things you can do to avoid or fix it. I usually use primes and was thinking of investing in a GH4 and some Micro 4/3 lenses. This lens was a potential candidate because of the O.I.S but I'm nervous about dropping cash on a zoom lens Speed Test now if this is going to be an issue. Thank you.
lvl.3