67 Advanced operations● ● ● The maximum number of flash units to be connectedusing cords• Up to five units including the master flash unit can be used for multiple flashphotography at a total cable length of 10m (33 ft.).• Make sure the combined total of the coefficients in the table below for all flash unitsused together does not exceed 20 at 20°C (68°F) or 13 at 40°C (104°F).• If it exceeds these figures, you may not be able to take a second shot after the first one.In this case, turn off the power of all flash units and reduce the total number of flashunits connected.Speedlight CoefficientSB-800, SB-600, SB-80DX, SB-50DX, SB-30, SB-29, SB-29s, SB-28,SB-28DX, SB-27, SB-26, SB-25, SB-24, SB-22s, SB-14, SB-11, SB-140 1SB-23, SB-21, SB-17, SB-16, SB-15 4SB-22 6SB-20 9● ● ● Notes on multiple flash shooting using cords• Be sure to see the instruction manuals of your cameras, Speedlights, and accessories.• Use the optional Multi-Flash Adapter AS-10, if the remote flash units are not equippedwith multiple flash terminals.• Use the optional Multi-Flash Adapter AS-10 to attach the remote flash unit(s) to a tripod.• Use the optional TTL Multi-Flash Sync Cords SC-27, SC-26, SC-19 or SC-18 to connectthe SB-600 to more than one remote flash unit.• Multiple flash shooting using cords can be performed in two modes: (1) TTL multipleflash; and (2) Manual multiple flash. Performing multiple flash shooting in the Manualmode, however, is not recommended, since it is difficult to obtain the correct exposure.Use the TTL auto flash mode with cameras compatible with TTL auto flash.• To ensure proper exposure, make test shots before shooting important events.All manuals and user guides at all-guides.com