Amazon.com : Universal 17MM to 52MM Phone Camera Lens Filter Adapter Smartphone Ring Video Rig Lens Adapter for 52mm Cpl Variable ND polarizing Filters Set Step up Rings for iPhone Android Phones :
Universal 17MM to 52MM 37MM to 17MM Phone Camera Lens Filter Adapter Ring Video Rig Lens Adapter for sirui zomi Filter|Mobile Phone Lens| - AliExpress
Ring Clamp Adapter for DJI OM4/OSMO Mobile 3 Gimbal Mount Extension Bar 2 Cold Shoe 1/4" Thread for Microphone LED Light Monitor|Gimbal Accessories| - AliExpress
Bynolyt Digiscoping Smartphone adapterring 53mm
Canon Smartphone Link Adapter AD-P1 (Android) – Pictureline
Smartphone adapter ring | Vogelbeschermingshop
Amazon.com: Neewer Cellphone Holder Clip Desktop Tripod Mount with Mini Ball Head Hot Shoe Adapter for 14-inch and 18-inch Ring Light and Smartphone Within 1.9-3.9 inches Width : Cell Phones & Accessories
smartphone adapter - OPT Telescopes
Smartphone adapter ring - Optics-Trade
Astromania Smartphone iPhone Adapter with T2 Thread and Eyepiece Adapter 52 - 59mm - for photography with telescopes and spotting scope or binoculars
KOM Cycling Smartphone Adapter, Black | Bikeinn
Smartphone Telescope Adapter & Mount Accessories | Buy a Telescope Phone Mount or Phone Telescope Adapter - High Point Scientific
Kase M17 Smartphone Filter Magnetic Adapter Ring | 41mm Diameter | Sui – Kase Lens USA
Universal Smartphone Digiscoping Adapter from Smartoscope
Swarovski Smartphone adapter AR-S Adaptor ring for ATS/ STS, ATM/ STM, STR
SmallRig 52mm Smartphone Filter Ring Adapter, M-Mount #3840 | eBay
Kowa TSN-AR500 Smartphone Digiscoping Adapter Ring for TSN-500 Spotting Scope TSN-AR500