Amazon.com : Nikon D40 Digital Camera USB Cable 3' USB 2.0 A to Mini B - (5 Pin) - Replacement by General Brand : Camera And Camcorder Cables : Electronics
Amazon.com : Camera AC Power Adapter Kit/Charger for Nikon D40 D40X D60 D3000 D5000, Replacement for EH-5 Plus EP-5, US Plug : Electronics
58mm AI 58 Macro Reverse Adapter Ring for Nikon D40 D90 D3200 D3300D 5100 D5000 D5200 D7000 DSLR and Film SLR camera|reverse adapter ring|adapter ringmacro reverse - AliExpress
Amazon.com : Nikon D40 Digital Camera Battery Charger (110/220v with Car & EU adapters) - UltraPro Replacement Charger for Nikon EN-EL9 Battery : Camcorder Battery Chargers : Electronics
Amazon.com : Nikon D40 Digital Camera Battery Charger (110/220v with Car & EU adapters) - UltraPro Replacement Charger for Nikon EN-EL9 Battery : Camcorder Battery Chargers : Electronics
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Nikon D40 Review: Digital Photography Review
Camera Battery Charger For Nikon D40 D40X D60 D3000 D5000 D8000 EN EL9 Lithium Battery for Nikon|Camera Charger| - AliExpress