Amazon.com : 58mm UV Filter for Canon Rebel T5, T6, T6i, T7i, T8i, EOS 80D, EOS 90D, EOS 77D, SL3 Cameras with Canon EF-S 18-55mm is STM Lens : Electronics
Amazon.com : 49mm 7PC Filter Set for Canon EF 50mm f/1.8 STM Lens - Includes 3 PC Filter Kit (UV-CPL-FLD) and 4PC Close Up Filter Set (+1+2+4+10) : Electronics
UV CPL ND FLD Graduated Close Up Filter & Lens Hood Cap for Canon EOS 90D 1300D 3000D 2000D 4000D Rebel T7 T100 on 18-55mm lens - AliExpress
Kolari R Drop-in Filters for EF-EOS R Lens Adapter – Kolari Vision
ZWO Canon EOS Lens Short Adapter for Electronic Filter Wheel # EFW-EOS-II
10 - Canon RF to EF Drop-In Adapter Filters :: Spencers Camera
Amazon.com : 58MM Ultimaxx Six Piece Gradual Color Filter Kit(Orange, Yellow, Blue, Purple, Red, Grey) For Canon EOS 90D, 80D, 77D, 70D, Rebel T7, T7i, T6i, T6, T6s, T5i, T5, T4i, T3i,
STC launches its over-sensor clip-in filters for Canon EOS R: Digital Photography Review