In some embodiments, an auxiliary optical device for a mobile electronic device has a mounting component that is configured to be selectively attachable and detachable from the mobile electronic device. The mounting component is configured to be coupled to and decoupled from a mobile electronic device using an anchor that is inserted into a port of the mobile electronic device. In some embodiments, the auxiliary optical device attaches to the mobile electronic device by clamping or otherwise contracting or squeezing upon a portion of the mobile electronic device. In further embodiments, the auxiliary optical device is configured to be attached to wearable devices, such as eyewear that includes an onboard camera lens.