SIONYX does not currently offer a lens cap for Aurora Series cameras.
There are a wide variety of third party products available including:
1) Rubberized Flip-Up Scope Lens Cover (size 49mm - 54mm)
2) or a lighter weight: 42mm Monocular Objective Lens Cap
2)
NOTE: SIONYX does not manufacture, sell, promote or support these products. Please use responsibly and at your own risk.