The Canon MT26EXRT Macro Twin Lite- Suits the entire EOS Range and offers the flexibility of radio flash capabilities with a design for close-up shooting. It uses a pair of flashes to evenly illuminate subjects when working with a macro lens. When both flash heads are simultaneously fired, a guide number of 26m at ISO 100 is possible, and extensive manual adjustment allows you to dial in settings down to 1/512 power. Both flash heads are detachable and, using the 2.4 GHz wireless triggering system, the heads can be easily positioned around the subject for more controlled and dynamic lighting configurations, including the ability to easily integrate other flashes into the setup.