Instructables
Picture of Light Painting 101

I have been seeing these cool light painting analogue shots from Lomography.com and got inspired to do some experiment using digital before trying on with analogue cameras. But before we proceed to the more technical stuff, I would just like to give you an overview what light painting is.

WHAT IS LIGHT PAINTING?

Light painting, also known as light drawing or light graffiti is a photographic technique in which exposures are made usually at night or in a darkened room by moving a hand-held light source or by moving the camera.

Along this tutorial, you would also encounter familiar terms such as ISO, Aperture and Shutter Speed. I am pretty certain you have already come across these technical terms before but to explain more, back in the old non-digital days, when we buy films (usually 35mm) for our cameras you will notice printed outside the box casing this --> ISO 100, 200, 400, 800; but what does it mean? A conversation between professional or even amateur photographers would also introduce you to terms such as aperture and shutter speed, but what are the importance of knowing these stuff to light painting?

WHAT IS ISO?

To clearly explain what this is, ISO as it relates to photography is a measure of how sensitive the capture array is to light. The higher the ISO, the more sensitive it is to light. ISO 100/200 are usually used to bright lit conditions such as sunny days or if you are using studio lights. ISO 800 for poorly lit conditions, ISO 400 for general purpose.

WHAT IS APERTURE?

An aperture is a hole or an opening through which light travels. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane. Generally, aperture and shutter speed are inversely related. Meaning if one goes up, you have to compensate by reducing the other one to properly expose the picture.

WHAT IS SHUTTER SPEED?

I'm pretty sure you all know what shutter speed is. This is basically the exposure time. :)

 
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Dark Light1 year ago
I'm curious, though. Where did you find the colored cellophane? I've been looking at hobby stores and can't find anything.
If you don't mind spending some money I would go for a Theatrical lighting supply company. Also I would check out Gift wrapping areas.
Thank you for the tip.
If your light source is small you can get a book of all the colors. Here is an amazon link to where they sell it. If you go to the supply companies, and say you need a gel swatch book for photography needs, they might give you one for free. 
Hey Pax, thanks for the link. I appreciate the followup.
PaxDesigns1 year ago
Love it! After reading this I went home to try it out. I added a flash and it looked amazing!

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Dark Light1 year ago
This was a really neat instructable! Thank you!

My wife and I have tried this and it's great fun...the kids love it, too.
Anphib3 years ago
Thanks for this instructable, I can't wait to test my light painting skills.