Nikon F/D/G Series Lens to Sony E Series Mount Camera, NIK(G)-NEX IV PRO High Precision Lens Mount Adapter - KENTFAITH
Amazon.com : Z-PRIME 65mm Telephoto Lens + Free Lens Adapter For iPhone 7 / 8 / 7 Plus / 8 Plus / X / XS / XS Max / XR : Electronics
Adapter lets you mount SLR lenses on iPhone
Amazon.com: Camera Hot Shoe Phone Holder, Flexible Phone Tripod Mount Adapter with Cold Shoe Mount for Microphone LED Light for iPhone Samsung Pixel Canon Nikon DSLR Camera Photography : Electronics
Fotorgear DOF Adapter
Mount Your Canon/Nikon SLR Lenses on Your iPhone - MacRumors
Cinematic Videos from Your iPhone? – Ulanzi DOF Adapter Review - Tips and Tricks | CineD