在官网找到解释了，In macro photography when a wide beam is not necessary, no diffuser should be attached. For an even strong circular 100x100 light output is desired, mount the Diffuser 100. When a wide-angle lens is used, the diffuser 120 should be attached. Three beam angles can be selected in accordance with the photographer’s requirements.
在官网找到解释了，In macro photography when a wide beam is not necessary, no diffuser should be attached. For an even strong circular 100x100 light output is desired, mount the Diffuser 100. When a wide-angle lens is used, the diffuser 120 should be attached. Three beam angles can be selected in accordance with the photographer’s requirements.
基本上一直挂着120的就好了