Fotodiox B4-MAGIC-CAP lens cap

B4 Magic Cap - B4 (2/3") Protective Metal Body Cap This custom all-metal cap fits on the front of the B4 Magic Lens Adapter or any B4 female lens mount such as an adapter or camera body. B4 body caps are exceedingly rare, so we created one to keep the optics of the B4 Magic Lens Adapter safe when you remove your B4 lens.

- Industrial Grade Anodized Aluminum for Maximum Protection
- Replace hard-to-find B4 caps with all-metal version that's built to last
- Protects camera sensors and adapter optics from damage
- Ridged outer edge for easy grip.