About this 3D model

Version 3.0 is now available at http://www.thingiverse.com/thing:49934. This is a spectrometer that straps onto an Android or iOS phone, tablet, or any camera capable of focusing very close (macro-mode) and allows you to collect spectra. Why would you want one? You can use it to identify the elemental composition of things (light bulbs, etc) based on the colors of light they emit. This version (2.3) reduces the number of parts to be printed, improves the light seal around the tube, and is MUCH sturdier than all previous versions.