For Canon TTL Oral Insect Insect Teeth Ring Light YONGNUO YN24EX Macro Ring Flash Speedlite 1. Automatic metering, quick call back, focus auxiliary lamp, front and rear curtain synchronization, custom function, sound prompt system 2. Scope of application: oral photography, jewelry photography, clothing detail photography, insect photography, flower photography 3. Support TTL flash, exposure compensation, exposure surrounding front and rear curtain synchronization, exposure lock Canon camera menu 4. Double lamp head macro flash, support flash ratio adjustment, flash control is divided into 8 levels of brightness adjustment (1128-11), A total of 22 levels of fine tuning, flash unit A or B can flash separately 5. Synchronize front and rear curtains 6. Front curtain synchronization: When shooting with flash, the flash flashes and illuminates the subject at the moment when the front curtain opens, and then the back curtain closes to complete the exposure 7. Rear curtain synchronization: The flash will not flash after the front curtain is opened, but the flash will flash and complete the exposure one moment before the back curtain is closed 8. LED focusing auxiliary lamp, focusing auxiliary lamp is divided into low light and high light mode, to achieve fast and accurate focusing 9. C.Fn Configures the user-defined function 10. Wide range of flash coverage: up and down can be adjusted 90 degree, inward 60 degree, outward 30 degree 11. Large size LCD display, can be more clear and intuitive view and set the flash function, more convenient use 12. Equipped with external power interface, equipped with bracket mounting hole, equipped with PC synchronization interface 13. If the light is insufficient, the auxiliary focusing light can be turned on to complete the shooting 14. Battery lock compartment design prevents accidental opening 15. Simple, firm and convenient foot lock button 16. Metal hot shoe interface, durable 17. Type macro flash for close up photography 18. Circuit design: automatic insulated two-stag