DSLRKIT 3.5mm to Male FLASH PC Sync Cable with Screw Lock for ROOK RF-16NE RF-603 Compatible with screw lock PC sync port,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 Compatible without screw lock PC sync port, eg: Seagull SC-2 SC-5 SC-6 3.5-PC