The little Nikon ML-L3 infrared remote is supposed to work with the d3100. You should be able to obtain one of those quickly, if that would suit your needs.
Kerry Pierce wrote:
The little Nikon ML-L3 infrared remote is supposed to work with the d3100. You should be able to obtain one of those quickly, if that would suit your needs.
Kerry
Nikon ML-L3 does not work on the D3100, For some reason Nikon did not put any IR sensor's on the D3100 and you must use a wired remote. This was one reason I sold my D3100
Sorry for the misinformation! Amazon listings show the ML-L3 in several locations, so I assumed that it was correct info. Next time I'll check NikonUSA....