If you’re into shooting macro imagery then you know that it can be difficult to nail focus. You’re probably working with paper-thin depth of field already, and every movement you make drastically changes everything if you’re shooting 1:1 or greater. Thats why you rent the Zykkor 4-way Macro focusing rail. This geared rail allow for very small, precise movement. Instead of moving the focusing ring of your lens to change focus, the macro rail changes the position of the camera overall, allowing for much finer adjustments.