How Do You Use Extension Tubes & Magnification Lenses?
A macro lens is a dedicated camera lens used by photographers to capture macro images. Macro images are defined as those that have a 1:1 ratio with the camera sensor—that is, the image projected onto the camera’s film or digital sensor is as large as the object itself. Extension tubes and magnification lenses are less expensive tools used to achieve effects similar to macro lenses. They can be used separately or in concert, or can even be stacked with macro lenses to reach even greater magnification levels. Use any standard non-macro or macro lens with your camera’s body. Choose a focal length appropriate for the subject you intend to shoot. Typically, the wider the lens, the lesser the magnification, but the smaller your working distance (i.e. you must get closer to your subject). Attach one or more magnification lenses to the front of your camera lens. They can be stacked in front of one another, and their magnification power is additive. That is, if you attach a 2 diopter magnific