These silicone rubber bands are not expensive, and they can also be used to provide extra grip on zoom or focusing rings.
Increase the lock effect but in practice this position works full time. It locks, and prevents creep, and also radically improves the feel of the lens zoom.
As you can see, it also looks pretty funky.
Size: 210 * 12 * 2MM (L * W * D)
Include : 1 x PHOTOGRAPHY Logo Silicone Rubber Lens Band