Amazon.com : Nikon Extension Tube Macro Ring Compatible with for Nikon D7100,D7000,D5600,D5500,D5300,D5200,D3300,D3200,D3100, D3000,D810,D70, D80, D90, D40,D4,D4S,D3,D3S,D3X,D2,D2H,DSLR Camera : Electronics
AF-S NIKKOR 24-120mm f/4G ED VR | Nikon
Best lenses for the 24M-Pix Nikon D7100: Best standard and portrait primes and zooms - DXOMARK
Amazon.com : Altura Photo 52MM 0.43x Professional HD Wide Angle Lens (w/Macro Portion) for Nikon D7100 D7000 D5500 D5300 D5200 D5100 D3300 D3200 D3100 D3000 DSLR Cameras : Electronics
Puluz Brand Photo Accessories, GoPro Accessories - PULUZ 2.5D 9H Tempered Glass Film for Nikon D7100