Ulanzi 1.33X, G2, Mounting Clips will not fit Iphone 12 Pro Max even without a case. You can use the standard 17mm USKeyVision case for the iPhone 12 pro max and mount it on telephoto and wide-angle lenses, but not on ultra-wide-angle lenses. It takes some getting used to installing them. The easiest way is to install the lens in the housing first, then the filter mount, and then the filter. This video was shot using this lens with a Mist+VND 82mm filter on a USKeyVision case for the iPhone 12 Pro max.
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