I was wondering why no mention of salvaging parts from an office overhead projector has never been mentioned in the forums? I would think this would be a pinned topic, since there must be several projectors that are being sold off at business actions as well as on ebay.

Its mentioned in theguide. But really, the optics available from the lumenlab store are much better quality.

This has been discussed before numerous times on this board.

The fresnels are the wrong size (smaller than 15") and the focal points are wrong

But using the OHP itself can be a fun introduction to projecting