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Microscope LED ring light
This LED ring light will fit on a microscope objective with 54mm outer diameter.
It is held in place with a 3d printed nut that tightens the grip.
It's made of three printed parts: reflector/ring, nut, cover/shade.
You will also need 2 LED strips, one 250mm (5 50mm sections), and one 350mm (7 50mm sections).
I added a new nut design: 'LED_RingLight-nut2', that has it's thread radius reduced by 0.1mm, to make it easier to turn.