ABScope: an ABS microscope

This is my first attempt at producing a useable and affordable 3D printed microscope for educational use. It is designed to use a low power objective (RMS 20.32 diameter; e.g. 10x - can be bought for ~£15) and a standard low power eye-piece (23.2 mm diameter 10X - ~£10). The images included here were taken with slighly lower power (8X eye-piece and 7X objective taken from a microscope that was no longer needed) using my mobile phone. The focus is adjusted using the main screw thread. The light source is a LED keychain light (costing just 40p) which is easily modified to provide illumination of different colours by replacement of the LED (it is sufficiently bright to excite GFP fluorescence). The stage is moveable and can then be 'locked' into place by just pressing downwards allowing the whole microscope to be lifted up and passed around. The objective thread prints well enough on my Ormerod (0.24mm layer height at 30mm/s) but the first time you screw in the objective take particular c