Godox V1-S TTL 1/8000s HSS 2600mAh Lithium Round Head Speedlite Flash for Sony. Round Fresnel Head for Soft Natural Light|: The 76Ws Godox V1 flash features stable color temperature at 5600±200K over the entire power range, and a guide number of 92 feet (28m) at ISO 100 and 50mm.