Moment offers a range of add-on lenses for iPhones. They have a 2x lens that can be mounted on the iPhone’s 2x for a total 4x. Not sure if that gets into the ra

Moment offers a range of add-on lenses for iPhones. They have a 2x lens that can be mounted on the iPhone’s 2x for a total 4x. Not sure if that gets into the range you are looking for. Moment has a pretty good reputation for quality. There might be some other longer lenses out there by other manufacturers.