NEEWER LS-51 Probe Lens - Used Once - 17mm Mount This is the NEEWER LS-51 probe lens. It's a rather unique lens with a 17mm mount, allowing connection to a smartphone via a cage. A separate 17mm screw-on smartphone cage is required for both iPhone and Android devices. It enables dynamic macro photography that cannot be achieved with a single-lens reflex camera or smartphone. I purchased it only to use it once on location, so I no longer need it. I believe the condition is quite good. It's likely made by the same OEM as SANDMARC. I think this lens rarely appears on the used market. I have lost the included Type-C charger, so please use a substitute.