Abstract: The present disclosure relates generally to optical devices. In particular, the present disclosure provides systems and devices relating to adaptable lens cover assemblies for protecting the optics of various optical devices, such as spotting scopes, telescopes, riflescopes and binoculars. The adaptable lens cover assemblies of the present disclosure are configured to protect the lenses of wide a range of optical devices, and enhance the overall durability and usefulness of an optical device.