The new PolarPro E-mount lens cap is in Stock at BHphoto (Click here) . The interesting aspect of this model is that an Apple Airtag or SD/CFexpress cards can be mounted behind the cap. If you lose your camera or if someone steals it, you may still be able to find it.
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**This post contains affiliate links to eBay and I will be compensated if you make a purchase after clicking through my links. As an eBay Associate I earn from qualifying purchases