Canon RF 35mm F1.8 Macro IS STM RF35mm F1.8 MACRO IS STM Instructions - Page 16

10. Macro Flash (Sold separately) The Macro Ring Lite MR-14EX II or Macro Twin Lite MT-26EX-RT enables flash photography up to 0.5x magnification in E-TTL II autoflash mode. zzWhen using a macro flash and filter at the same time, attach the flash head to the lens while the filter is attached to the thread for attaching the filter in the front end of the lens. zzIf a filter is attached to the macro flash, the front end of the lens and filter contact, which hinders focusing. It also may damage the filter or causes the lens to fail. zzFor how to use the MR-14EX II and MT-26EXRT, please refer to the lite's instructions. ■ When the MR-14EX II is in use • Effective Flash Range (Reference) ISO100 22 ↑ 16 11 Aperture 8 5.6 4 2.8 2 1.8 Magnification 1:5 1:3 1:2 Focusing 0.27/ 0.20/ 0.17/ distance (m/ft.) 0.89 0.66 0.56 ISO400 22 16 11 8 5.6 4 2.8 2 1.8 1:5 1:3 1:2 0.27/ 0.20/ 0.17/ 0.89 0.66 0.56 : Effective flash range (both sides firing) ■ When the MT-26EX-RT is in use The MT-26EX-RT's flash range largely depends on the flash head's position. zzIn the event of over-exposure, use a diffuser adapter, lower the ISO sensitivity setting, or reduce the aperture size. ENG-15