Last week I wrote about Shuttr, the tiny Bluetooth remote control for smartphones that lets users take better self-portraits and group shots. But Shuttr can be used for more than just selfies. Other accessory developers have been experimenting with Shuttr to see how far it can extend a smartphone camera’s capabilities. For example, when Shuttr is combined with adapter Snapzoom and an optical scope, it creates an inexpensive and portable way to take clear, high-resolution macro and long-distance shots.