Originally posted by Sandy Hancock I have two. The Black Rapid screwed into the camera's tripod thread is my currently preferred option with heavy lenses. When I run I keep my forearm gently over the barrel of the lens to prevent too much torque on the mount.
I haven't tried it yet, but I reckon the Peak Design system (which I'm currently only using with smaller lenses) could also work well, with one attachment on the camera's left lug and the other on the lens' tripod foot. I'll give it a whirl soon and report back!
Quick word of warning on the Peak Design solution.
I have been using my Peak Design slide/sling for two years straight with no issues with either the straps or the anchors. However, I would highly recommend
NOT configuring the anchors in the combination you have suggested (aka, one on the left of camera, one on the tripod foot). This is a recommendation both from experience and from the heart. Back in my FA* 80-200mm f2.8 days, I had my anchors setup in this way, and after a year of heavy use, I had created a loose fitting tripod foot ring (loosened the ring on which the foot sits on, relative to the back of the lens), which I believe is due from the increased torque from the two anchors flexing on different axis when hanging at hip height.
We would both likely agree that the DFA* 70-200mm f2.5 is built to a more durable standard than that of the FA* 80-200mm f2.8, but nonetheless, my recommendation with large lenses like this would be to get the larger "Peak Design Pro Plate" (the one with orange/red rubber), and attaching both anchors to the quick release plate. This will lessen the torque felt by both the lens mount and the tripod foot, reducing the wear and tear on both ends. If you'd like a photo of my solution, I can post one tomorrow morning!