Possible magnification range: 10-100x (dependent on objective lenses)
discarded photo enlarger
8 X 21 mm binocular
some pieces of scrap wood
Optional: some discarded camera lenses, piece of aluminum sheet.
Costs: 15 - 20 E / $
I built the microscope on this picture some years ago, but made another one for this instructable. So I did not spend much time to put a nice finish on parts.
Step 1: The stand
Take the mechanism part of the enlarger off the base. The lower part, below the film holder will become the base of the microscope. Take it apart from the light source and condenser.
The rest of the enlarger is no longer needed. It might serve as a stand for copying documents.
Step 2: Turn the enlarger into a microscope stand
Perhaps the base needs to be supported with a piece of wood to stand upright. The hollow part of the base plate, designed to allow the light to get through, needs a wooden insert. This will be the object table. Do not fasten it, because transparent objects have to be viewed with light from below, you can use a glass plate as object table for this.
Step 3: Taking the binocular apart
Take the cord out, it is fastened by special screws. Underneath is another screw, unscrew it.
The small telescope (monocular) can now be carefully taken from the connecting/ focusing bridge, 2 small steel balls will come out as well.
For this project, it is sufficient to just use one of the monoculars. However, to get some understanding of the optics, why not take the other half apart .