Is it just me or is the focus ring overly sensitive and prone to be moved every time you look at the camera? I have done various versions of tape to maintain focus but that is tacky. (I liked the blue painters tape best though. Easy to remove and no residue.) I have a solution if anyone is interested.
I designed a ring with a small tab that fits into the focus ring knurl. While it is not "continuous" focus, it jumps between notches, there is enough DOF to cover a fraction of a click. I've been using this for 6 months with no problems. I do have 2 pieces of double stick tape holding the ring in place. I love it, it looks cool and much easier to live with than tape is. The ring was modeled in SolidWorks and printed on an Objet printer with a 24 micron resolution. You could not print this with a common FDM Makerbot type printer. ( I have access to various 3D printers and have those too, so I know their capabilities and I've been 3D printing for 11+ years.)
What do you think?