SP-1 Smartphone Optical AdapterSP 1 Smartphone Optical Adapter NightVisionExperts. coms SP 1 Smartphone Optical Adapter couples any smartphone to a wide assortment of night vision scopes, binoculars and goggles. Expand your optical product's application range by levering the power of your smartphones video recording, geo tagging and messaging features. Simply turn a key to clamp your SP 1 to any optical device with an ocular measuring from 31 38 mm. The unit's micro adjustment