Nikon AF-S VR 70-300 f/4.5-5.6G IF-ED Tripod Collar

THe only one I have seen was a sort of sling that used one of those cap keeper type rings around the lens, then attach the other end to the camera strap to make a sort of sling.

You may try to get one of those hand camera straps to loop around the lens but leave the tail long enough to attach to something.

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I Shoot RAW