Nikon D3100 (The Expanded Guide): Sparks, Jon: 9781907708107: Amazon.com: Books
Amazon.com : USA GEAR DSLR Camera Sleeve Case (Tropical) with Neoprene Protection , Holster Belt Loop and Accessory Storage - Compatible With Nikon D3100, Canon EOS Rebel SL2, Pentax K-70 and More : Electronics
Amazon.com : Voking VK750II TTL Camera Speedlite Flash Compatible with Nikon D3500 D3400 D3300 D3200 D3100 D5600 D7100 D7200 D5300 D5500 D500 D850 D750 and Other DSLR Cameras : Electronics
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Amazon.com : 52mm 7PC Filter Set for Nikon D3100, D3200, D3300, D5100, D5200, D5300, D5500 with NIKKOR 18-55mm f/3.5-5.6G VR II Lens - Includes 3 PC Filter Kit (UV-CPL-FLD) and 4 PC