Xiaomi's “Ultra” camera phone has a grip accessory, screw-on lens filters

The grip has a shutter button, zoom controls, and standard 67 mm lens-filter support.

Sesenpro Phone Lens Filter kit, Polarizer/GND8/ND8/ND16/Natural Night/Star 6 in 1 Square Filter with 16 Multi-Layer Coatings Waterproof, Includes Phone Filter Clip and Tripod for Most of Smartphone : Electronics

NEEWER PA021 Handheld Smart Phone Cage with Filter Thread Adapter For SAMSUNG S23 Ultra 67mm Filter Thread Adapter - AliExpress

Buy Fotorgear Professional Phone Case with Bluetooth Shutter Photography Kit for Xiaomi 13 Ultra Filter Accessories 67mm Filter at Aliexpress for .

Fotorgear Professional Phone Case with Bluetooth Shutter Photography Kit for Xiaomi 13 Ultra Filter Accessories 67mm Filter

Andoer Smartphone Vlogging Hand Grip Mobile Phone Video Recording Holder Handle Stabilizer Cellphone Clamp 40mm-85mm Width with Microphone and Mini LED Light

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JJC Magnetic Phone Camera Grip Handle with Wireless Shutter Remote, Magsafe Camera Handle Bluetooth Bracket for iPhone Android Smartphone with 1/4” Tripod Screw for Video Photo Shooting (Black) : Cell Phones

Moment O-Series Universal Lens Mount (107-010) - Moment

SmallRig 52mm Magnetic Cellphone Filter Ring Adapter for Magnetic ND CPL Filter, Compatible with Phone Cage with M Lens Mount for iPhone 14 13 12 Series - 3840 : Cell Phones & Accessories