Put simply, macro photography is close-up photography. Depending on the lens or lenses that you got with your camera, you may have the perfect tool for macro work. Some lenses are designed to shoot in a macro mode, but you don’t have to feel left out if you don’t have one of those. Check the spec sheet that came with your lens to see what its minimum focusing distance is.
If you have a zoom, you should work with the lens at its longest focal length. Also, work with a tripod because handholding will make focusing difficult. The easiest way to make sure that your focus is precisely where you want it to be is to use manual focus mode.
Since I am recommending a tripod for your macro work, I will also recommend using A (Aperture Priority) mode so that you can achieve differing levels of depth of field. Long lenses at close range can make for very shallow depth of field, so you will need to work with apertures that are probably much smaller than you would normally use. If you are shooting outside, try shading the subject from direct sunlight by using some sort of diffusion material, such as a white sheet or a diffusion panel. By diffusing the light, you will see much greater detail because you will have a lower contrast ratio (softer shadows), and detail is often what macro photography is all about (Figure 11.11).