Thiq5 PL extension tube shifts the lens's focus scale toward near focus, allowing the lens to focus at extreme and macro distances but at the cost of losing the ability to focus deep and less than one stop of light. This macro tube is fantastic for macro and extreme close-up inserts, but note it is not capable to allow a rack focus from far focus to macro range, as a true macro lens can do. Additionally, the Duclos PL extension tube is a great alternative to diopters, depending on your needs. This 15mm PL extension tube works mainly with 32mm lenses and longer. If you want more macro ability try the 20mm macro tube listing for 50mm lenses and longer.