GuerillaBeam LED projector - slide holder

by universalist, published

GuerillaBeam LED projector - slide holder by universalist Feb 21, 2015


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GuerillaBeam allows you to build powerful modular and portable image projectors. Fits any 35mm lens and various flashlights and speedlights.

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 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).


I usually print it with 0.8mm wall thickness and ~23% fill density.
0.1mm layer thickness is recommended, but you can go up to 0.25mm if you're in a hurry.

Support material is required for printing a correctly dimensioned slide slot. Without supports, you will get an ugly slide slot that's way too thin.
See the attached screenshot for an illustration of proper supports.
With Cura, supports will be automagically generated at just the right places by setting overhang angle for support to 51 degrees (Lines support type and 15% fill amount).
With other slicers you should be able to find your own way.

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Any plans to do this for medium format 6x6? Pentax or hasselblad mount etc..

Canon FD mount adapter?

You can try https://www.thingiverse.com/thing:793338
BUT you'd be better off using a glassless FD-mount to EF-mount adapter from eBay together with the GuerillaBeam EF-mount adapter here https://www.thingiverse.com/thing:1062085

Canon FD lens adapter for GuerillaBeam
GuerillaBeam SLR lens adapters

What Amazon orderable flashlight do you recommend for this?

I can't point you to a specific offer, since I don't know where you are. Just search for a "TrustFire X8". You could also buy the C8 light from the same manufacturer.
I'd recommend buying from a reputable supplier, since there are a lot of knock-off products. Those are are often inferior or physically different (won't fit the adapters I provide here). Also, the most cheap offers often come with batteries and chargers that are outright dangerous.

The one you posted is one of the counterfeits I mentioned. You can tell by the cheap reflector.
This one is the only seemingly legit TrustFire X8 I could find on Amazon.com: http://www.amazon.com/TrustFire-XM-L-Lumen-Flashlight-Torch/dp/B005SS9QB8/

Still haven't found a good flashlight for this :(

You are on Thingiverse, most likely own a 3d printer and thus use (at least a little) a 3d modeling program. Buy what ever flashlight seems powerful enough and modify one of his adaptors to fit!

I really love the idea of this and I'm trying to get my head around to make one. I know I have a ~50 something lens for my Nikon D70s. It's a fixed zoom and I believe it should be f1.4. But are there any lens adapters available for the Nikon lenses?

Found the lens that I have. It's a Nikon 50mm f/1.4 G lens.

Is this compatible with the GuerillaBeam?

Sure thing.
Here you go: https://www.thingiverse.com/thing:791178
Please let me see you make when you print it! :)

Nikon F adapter for GuerillaBeam projectors