Blackmagic Forum

I just got secondhand Metabones Speed Booster 0.58x Nikon adapter. Works well but Nikon lens mount feels slightly wobble when i rotate focus ring.
So i found how to fix wobble lens. May be usable with other lens adapters as well.

1. Take brass or copper sheet 0.4...0.5mm thickness
2. Cut 3 little shims 2mm x 9mm
3. Insert shims under springs in lens mount adapter




P.S. Metabones products quality control is really strange. I got another similar but non speed boosted Metabones adapter new from Adorama, and it can't fit to BMMCC camera mount at all. Same Nikon lens fits into it extremely stiff, even if lens mount is greased. Not usable at all. So i send it back to Adorama. Shame.

I find it's easier to put a small flat headed screwdriver in the gap and bend the tabs out when I get a sloppy mount.

It depends of lens mount design. It appears that Metabones adapters use thick springs made of quality spring steel. They can't be bended. They can be only break apart.

Other adapters may have less rugged springs that is possible to bend. But anyway i am not recommend to bend springs a lot because spring steel is easy to break apart during bending.

Some other adapters have different design without separate springs. Lens mount with holes by itself provides tension. They need to be adjusted time to time. https://fotodiox.freshdesk.com/support/ ... on-adapter

They can be bent and I doubt very much they are made form a true spring steel.