When I buy a new S4 fixed or zoom it has white lubricant in the rim of the Shutter Barrel.
After a while this lubricant disappears.
Do I have to re-apply this lubricant?
What kind of lubricant is this?
Where can I buy this lubricant?
Thanks for the question! That lubricant should last pretty much for the life of the fixture. However, if you'd like to reapply, we use Tiolon A20. https://www.tiodize.com/dry-film-lubricants/
Thanks a lot !