GuerillaBeam allows you to build powerful modular and portable image projectors. Fits [any](http://www.thingiverse.com/tag:gbeam-lens-adapter) 35mm lens and [various](http://www.thingiverse.com/tag:gbeam-light-adapter) flashlights and [speedlights](https://www.thingiverse.com/thing:698200).
Fits common 5x5 cm slides with 2mm (*Agfa CS*) or 2.5mm thickness.
Robust 53x3mm threads will attach any 35mm lens and LED lights. An [Open Source extension tube](https://www.thingiverse.com/thing:863055) is available for creating your own parts.
Slots on the inside allow for embedding fresnel lenses (sized 48.5mm x 38.5mm x 0.5mm) or color gels. Use the topmost slot for boosting projection performance with a collecting lens.
For more information or buying finished projectors please refer to http://gbeam.de (site is in English).