Canon Knowledge Base - How to apply creative filters to images captured by EOS REBEL T3i.
Amazon.com : Neewer 58MM Lens Filter Accessory Kit (UV, CPL, FLD) for CANON EOS Rebel T5i T4i T3i T3 T2i T1i XT XTi XSi SL1 DSLR Cameras : Electronics
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,
58MM Lens & Filter Kit for Canon Rebel T5i T4i T3i T3 T2I T6 T6I 18-55mm 25 Pcs | eBay
CANON EOS REBEL T3 KISS 350 1200D ULTIMATE PRO LENS FILTER FLASH TRIPOD GRIP KIT | eBay
Amazon.com : Digital Nc Canon EOS Rebel T3i High Grade Multi-Coated, Multi-Threaded, 3 Piece Lens Filter Kit (58mm) Made by Optics + Nwv Direct Microfiber Cleaning Cloth. : Camera Lens Filter Sets :
58MM 3 LENSES Filter Set + Accessories for CANON EOS REBEL T3 T4 T5 T3I T4I XS | eBay