Nikontrol 3K is a free remote control PC software for Nikon DSLRs *updated* - Nikon Rumors
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
Amazon.com : Nikon D3100 14.2MP 1080p Digital SLR Camera Body (Black) 25470B - (Renewed) : Electronics
How to Tether a Nikon D3100 Using digiCamControl: 9 Steps
Nikon D3100 Review | Digital Trends
Use you NIKON D3100 as webcam with CLEAR Live View (2022) (+ Microsoft Teams Setup) - YouTube