Meike MK GT600 MK-GT600N Receiver 2.4G Wireless 1/8000s HSS TTL Flash trigger Receiver for Nikon D7100 D7000 D5100 D5000 D5200 meike mk n af1 b auto focus macro extension tube ring plastic for nikon d800 d90 d3200 d5000 d5100 d5200 d7000 d7100 camera dslr