Either will work if you can trigger them . Using a strobe or any other manual nonsystem flash means that either the flash in the hotshoe triggers the strobe optically , or you use radio triggers that fires the strobe . Using a system flash iTTL or eTTL usually means that the flash on the hotshoe triggers the slave flash via pulses of light before the exposure begins . One benefit of this that extra triggers aren ' t needed , but they are line of sight for triggering usually not a concern in most situations . <| sep |> Thank you any suggestions as for brands that may be good to buy second hand at lower prices ? <| sep |> Is it just me or it smells like shit in here ? <| sep |> Is trade through the plaza ? my first time trading in sun and moon , , sorry .