Compatible with Fujifilm cameras, Canon, Nikon, Olympus e Sony, the Lux Junior Retro Flash Camera of Godox It is a tiny light source from 3 x 2.8 x 2 "with basic features and is small enough to be able to mount it regularly on the camera.Called "retro" flash, the unit has a simple dial that correes ISO with openings, power levels and recovery distances. For example, if you want to take 5 minutes with a 400 ISO, the rail aligned f / 4 and 1/8 of power. The flash also has an automatic mode, which by default is f / 2.8 to ISO 100.Control functions include an optical mode that offers S1 and S2 settings. In S1 the flash will activate in response to another manual or TTL flash, while in S2 the back flash will respond similarly, but ignores the initial flash. The unit works with AAA batteries purchased separately and is supplied with an activation cable and a case.