Get up close and personal with your subject!
1. The magic of depth of field
Understanding depth of field is one of the most important concepts in creative macro photography. Becoming familiar with how the aperture, magnification and focal length of the lens all interact with each other is essential to your success as an artist with a camera. DOF has a great impact on the aesthetics of your images. Creating images with aperture f/2.8 and then f/16 will produce very different results.
The selected aperture, along with magnification, will control depth of field. As magnification increases, depth of field decreases. Smaller apertures provide greater depth of field while larger apertures reduce it.
There are many creative choices you can make with aperture. How do you decide which aperture will be best for your image? Think about your subject, and how much story or information you want or need to express in your interpretation of that subject. Think about what you want to emphasise and how you want your image to look.