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What's wrong with the standard $5 infra-red one?
Which cheap wifi? The one for the D800 is the WT-5a plus UT-1 for like $1400. Am I missing something?WR-A10 + WR-T10 = $160 I'm sure there is a pocket wizard solution for cheaper...
Vello FreeWave Plus Wireless Remote Shutter Release for Nikon $60REG/Vello_RWII_N_FreeWave_Plus_Wireless_Remote.html