About Camera features on your iPhone – Apple Support (UK)
Review: Moment's Tele Lens brings up to 4x optical zoom while MFi Battery Case doubles your iPhone charge and adds a DSLR-like shutter button - 9to5Mac
Olloclip Lenses for iPhone SE 2020, 8 and 7 Fisheye, Super Wide and Macro : Amazon.co.uk: Electronics & Photo