Compatible with Tamron 18-400mm f/3.5-6.3 Di II VC HLD B028. Specially tailor-made for Tamron 18-400mm F3.5-6.3 Di II VC HLD B028 lens, reserved window for the LOCK switch of the lens, other switches are blocked; the lens collar is fixed by the switch and cannot be rotated and cannot be used for other lenses;.
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