Macro photography with viltrox extension tubes
Extension tubes are a good low cost alternative for photographers who want to experiment with macro photography without having to buy a lens especially designed for macro. They are a few empty tubes (with no optical elements inside) set between the camera body and your lens, thereby increasing the distance between the lens and the focal plane of the camera (either a sensor or a negative). This fact considerably reduces the minimum focusing distance of our lens and allows us to get much closer to the object to be photographed in macro. In the other hand, when we use optical extension tubes the lens loses the possibility to focus to infinity, so we can only use them to photograph items that are close to us. Another aspect to consider when working in macro photography is the depth of field: it becomes critical and can be only about a few millimeters. Therefore you will usually have to work with closed apertures, that will help you increasing the depth of field to keep a focused scene. In addition, we also have to consider the fact that...