In the past few years, we have covered a whole host of awesome anamorphic iPhone lenses that let you capture cinematic footage with your smartphone. The Moondog Labs 1.33x Anamorphic adapter is made for iPhone 8 Plus and older iPhones. It has an anodized aluminum & glass construction.
This lens comes with a simple clamping mechanism to mount to your device. It lets you shoot 2.4:1 video and 16:9 photo with this.[where to get it]