Photography as both a profession and a hobby is an incredibly expansive topic that covers a remarkably vast range of subjects from science and art. No matter where you lie on the professional spectrum, there is simply always more to learn. These photography tutorials cover the basics as well as more advanced photography techniques to help you gain a better understanding of the art.
Macro photography is close-up photography. The classical definition is "photography in which the image on film or electronic sensor is at least as large as the subject". This definition means that on 35mm film the camera has to have the ability to focus on an area at least as small as 24.36 mm, as this is the size of the image on the film. This is a magnification of 1:1.