Mount a filter to your phone, even without a case. Works over all 3 lenses of iPhones (and most other smatrphones), works with your phone’s microphone, and works with variable ND filters. It just works. The 67mm filter mount is the best way to use a filter over the triple lens camera on new devices like the iPhone 11 Pro. Its low profile design and precise geometry means no vignetting over the ultra-wide (with most filters, VND filters may cause vignetting), and seamless transition between cameras with the same filter attached.
The easily attachable, precision machined aluminum mount clamps securely onto your phone, with or without a case on. Unlike other mobile filter solutions that block the mic hole, it actually allows you to use the audio from your phone’s rear facing microphone while filming. Moment achieved this by machining a speaker grill into the mount and bonding a sound permeable membrane to allow audio pass through. Don’t worry though, it doesn’t let any light in.