Advanced Wireless Lighting Instructions for the Nikon SB-600 Speedlight Flash
Amazon.com : Optical Flash Slave Trigger JJC Hot Shoe Sync Adapter with PC Socket,Optical Sensor & 1/4"-20 Threaded Socket Cold Shoe for All Flashes Speedlight with Standard ISO 518 Hot Shoe-1 Pack :
Nikon SB-600/SB-800-900/SB-28 DSLR slave flash « Wildlife Photography in Thailand and Southeast Asia
N.Mint in box] Nikon SB-600 Speedlight Shoe Mount Flash Boxed from Japan 18208048021 | eBay
Nikon Dropped the Term 'Slave' 20 Years Ago Due to 'Negative Context' | PetaPixel