The Nissin MF18 Ringflash is designed to work with the E-TTL mode (Canon) and iTTL mode (Nikon). Featuring a Fine Macro mode, this flash provides highly precise light
control from 1/128 to 1/1204 in 1/6 EV steps, to achieve the greatest
accuracy. When used in manual mode, the flash can be adjusted in 1/3 EV
steps from full power down to 1/64th power. The tube flash design is
divided in half, allowing you to vary light output depending on the
lighting conditions. This design also works in conjunction with the
expansion flash head, permitting use of this flash on lenses ranging
from 49mm to 82mm in diameter (with adapter rings for 52mm, 58mm, 62mm, 67mm, 72mm, 77mm included).