I originally had a Ztylus 4-1 for my iPhone 6S. I really liked him. But when I got the iPhone 8, I had to order another one to fit a different sized phone. The fisheye lens wasn't nearly as wide as my previous Ztylus. Fisheye wasn't as round and distorted as I like. I was about to return it, very disappointed, but then I tried the old 4-1 with the new metal case on an iPhone 8. It worked! And it works! And I'm very happy that I still have the performance of my original lens. However. The smaller fisheye lens was a big disappointment. For that reason I'm rating it a 3. If this version of the Ztylus 4-1 was my only experience with this lens I would return it and find it's just another useless lens. But from years of experience with my original 4-1, I know how versatile this lens must be. I'm so glad I was able to fit it into the new case size.
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