Moondog Labs-52Mm Filter Mount for Anamorphic Lenses : Amazon.ca: Electronics
Moondog Labs - This is the @moondog_labs 1.33X Anamorphic Lens Bayonet Mount with our 52mm Filter Mount and 3-stop ND Filter attached to an iPhone12 Pro Max via the @polarpro LiteChaser Pro
Multi-Camera Filter Mount V3 : Amazon.ca: Electronics
This Mount Lets You Use 52mm Lens Filters on Your iPhone | PetaPixel
Moondog Labs launches a 52mm filter holder for smartphone cameras: Digital Photography Review
Moondog Labs-52Mm Filter Mount for Anamorphic Lenses : Amazon.ca: Electronics