The Nissin i40 Flash is a shoe-mounted, compact flash unit designed for Four Thirds cameras featuring TTL functionality. It features a guide number of 131' at ISO 100 and in the 105mm position for providing excellent coverage within a zoom range of 24 to 105mm, or down to 16mm with the built-in wide-angle diffuser. Also, this unit features an LED light suited for video work with 9 output levels.

For control of the light during use, the flash head is able to tilt upwards 90° and can rotate 180° in both directions, giving you complete 360° coverage. There is also wireless TTL functionality which will allow you to implement this flash off-camera in combination with other units.

The i40 features full manual control and a range of modes for getting the look you desire from your lighting. These include slow-speed, high-speed, 1st and 2nd curtain synchronization in addition to variable power from 1/1 to 1/256. The flash runs on 4 AA batteries and includes an external diffuser, soft case, and stand.