This is a short instructable to show you how to make a solar filter for your telescope or DSLR camera.
Cardboard (recycle a cereal box)
Solar film (Baader or other make)
telescope lens/dust cap
Step 1: Cut Cardboard Strips
Take the card and cut it ito strips. You need to cut 2 strips per filter.
Step 2: Make Cardboard Rings
Repeat this with the next cardboard strip but wrap the cardboard around the first cardboard ring. The second ring should easily slip over the first and slide up and down.
Repeat both steps for your camera lens as well.
Step 3: Cut Solar Film to Size
Place the cardboard rings on the filter film and mark and cut out square pieces.
Step 4: Final Step
Place the piece of square solar film on top.
With the second slightly bigger ring, locate on top of the smaller ring and slide it down trapping the film between the two rings.
Trim any excess film.
Repeat for the camera lens filter.
If you are making this for a telescope, it migh be a good idea to also make one for the finderscope.
Please remember that these filters will only filter the sun from one eye. Always keep your other eye closed or you risk blinding yourself.