Amazon.com : Meike MK-MT24 Macro Twin Lite Wireless Remote Flash with TTL Transceiver/Trigger for Nikon D1X D2 D80 D90 D610 D3100 D3200 D3300 D3400 D5000 D5100 D5300 D5500 D7000 D7100 D7200 Digital
Amazon.com : Dual Macro LED Ring Light/Flash Compatible with Nikon D3100 (Applicable for All Nikon Lenses) : Electronics
Amazon.com : Yongnuo Professional Flash Trigger Rf-603 Ii N3 for Nikon DSLR D7100, D7000, D5100, D5000, D3200, D3100, D600, D90, D53, D750 Etc : Electronics
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David Busch's Nikon D3100 Guide to Digital SLR Photography (David Busch's Digital Photography Guides): Busch, David D.: 0082039559117: Amazon.com: Books