Fritzo
Lifer
- Jan 3, 2001
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I just "came" across this: (no pun intended)
Balloons and Condoms
By filling a balloon or condom with water, you can transform these ordinary objects into fire creating lenses.
Fill the condom or balloon with water and tie off the end. You?ll want to make it as spherical as possible. Don?t make the inflated balloon or condom too big or it will distort the sunlight?s focal point. Squeeze the balloon to find a shape that gives you a sharp circle of light. Try squeezing the condom in the middle to form two smaller lenses.
Condoms and balloons both have a shorter focal length than an ordinary lens. Hold them 1 to 2 inches from your tinder.
Balloons and Condoms
By filling a balloon or condom with water, you can transform these ordinary objects into fire creating lenses.
Fill the condom or balloon with water and tie off the end. You?ll want to make it as spherical as possible. Don?t make the inflated balloon or condom too big or it will distort the sunlight?s focal point. Squeeze the balloon to find a shape that gives you a sharp circle of light. Try squeezing the condom in the middle to form two smaller lenses.
Condoms and balloons both have a shorter focal length than an ordinary lens. Hold them 1 to 2 inches from your tinder.