I wrote a blog post and did a video on this project and here it is . In the end I was able to project my 4x5 slides in a very dark room for my own viewing but I am happy enough.
Think of the brightness more like a oil lamp magic lantern projector rather than those 35mm slide projectors with a hot bulb and fan.
https://petapixel.com/2021/07/06/how...ide-projector/
Any suggestions for improvement are welcomed!
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