Compatible with screw lock PC sync port. compatible without screw lock PC sync port. Seagull SC-2 SC-5 SC-6. eg: CANON 580EXII 7D 5DII 50D 40D 30D 20D 10D 1D. NIKON D300S D300 D200 D100 D700 D3X D3S D2X D2H D1 SC-15 SB-900,800,80DX,29s, 29,28DX,28,27,26,25,24,22s,22,20,17,16,14,11,140.
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