That is what this post is about. I have noticed that my blog is surprisingly devoid of down to earth advice and works without supplemental light.
In it's essense photography is one thing. Light.
How you control that light is crucial to how your photo will turn out and the effects you can accomplish. Your tools to control light are your shutter speed, aperture and ISO.
The shot below was captured with only *insert shocked sounds* ambient light.
Canon EOS 5D mkII
Canon 200mm f/2.8L
1/500, ISO 800, f/4
Read more after the jump.