MFD stands for Minimum Focusing Distance and is the closest distance any lens can focus. Used properly, it allows a lens to achieve the greatest magnification within its working range. Each lens has a specific MFD and is measured from the imaging sensor denoted as the ᴓ symbol on the top of your camera. Any zoom lens that says “macro” has the capability of 40% life size (1:4) and is considered a close up photography lens. To use a zoom lens with macro properly, zoom the lens to its furthest length and place your camera at the minimum distance. For example, if I am using Tamron’s SP 28-75mm F2.8 lens which has an MFD of 13", I will zoom to 75mm and focus 13” from the camera sensor (ᴓ). Use a tripod for the most consistent results. This is an obvious tip, but very important to note. For the most flexibility, look for one with a center column that can bend at a 90° angle and legs that can be set to different angles. A stable foundation is essential for images with a long depth of field. Other things to note: for greater stability, use a remote or 10 second timer to allow any movement from you or the camera to settle.
As always, thank you for reading.