The Canon Power Diaphragm Assembly YG2-3001-010 is a lens component listed for the EF 24-70mm F2.8 L II USM. Its role is aperture control, making it a repair part for that lens’s diaphragm mechanism.
The part number identifies the specific unit, so it can be distinguished from other diaphragm assemblies. It is intended for the named lens model; no broader compatibility is established here.
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