What the thread found

• Older Bartech focus knobs have different proportions that prevent compatibility with current drop-on marking rings.
• PVC pipe has been attempted as a homemade solution for slip-on marking rings but was reported to have durability or wear issues.
• Delrin material was used successfully as an alternative to PVC for custom marking ring construction.
• 3D printing services can be used to create replacement focus rings in various materials.
• Aluminum marking discs became available as a factory option compatible with different Bartech handset sizes.

Depends on

• The specific reason PVC failed was not clearly documented in the discussion.
• The Bartech model version and exact focus knob diameter specifications were not provided.
• No detailed construction methods or material specifications for DIY solutions were shared.
• The timeline and availability of the commercial aluminum solution relative to the original inquiry is unclear.

Gear in this thread

BFD

Parts

Follow Focus

Same gear or parts

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