I recommend this product
Kase Telephoto Lens
I use the XS max - lens can only be used on one lens. Other than that, A+
The Kase Mobile Phone Holder for iPhone XS MAX is the perfect companion to your Kase Lenses and the iOgrapher Multi Case. It will enable you to mount your Kase Wide Angle, 3X Telephoto, or Super Telephoto Lens on your iPhone XS MAX.
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