How to Tether a Nikon D3100 Using digiCamControl: 9 Steps
Micnova ELELAB07GZPW193 GPS-N Plus High-Precision Camera GPS Receiver Navigation Geotagging for Nikon D3100, D3200, D3300, D5000, D5100, D5200, D5300, D
Nikon D3100 Kit with Standard Zoom and Telephoto VR Zoom Lenses 14.2-megapixel camera with image-stabilized 18-55mm and 55-200mm lenses at Crutchfield