Amazon.com : GoPro HERO11 Red Filter: Includes 60m (196ft) GoPro Underwater Housing & 3 Filters - Laser Cut Low Iron Glass (Superior Clarity) - [Compatible with GoPro HERO11, HERO10, and HERO9] : Electronics
Amazon.com: Waterproof Case Dive Filter for Hero 8 9, Underwater Camera Dive Filters,Red Pink Purple Professional Waterproof Housing Shell Filters,for Underwater Video and Photography Enhances Colors(Red Filter) : Electronics
Amazon.com : GoScope (60M) Red Filter - Compatible with GOPRO HERO4 / HERO3+ / HERO3 Dive HOUSING (60M Case Only) Laser Cut Optical Red Filter (See Pictures to Make Sure This FITS
Breakthrough X2 Infra Red Filter Review - Camera Jabber
Added a red filter by sacrificing an old uv filter to use as an adapter ring. Super cheap workaround if you have a 49mm lying around : r/x100v
Cameras
Watershot® PRO Line Red Filter for 0.35X & 0.39X Wide Angle or Standar – Watershot Incorporated
Lens Filters | Camera Lens Filters Explained
Kool Family has BW mode. If you have a red filter, you can get a darker sky against snow! : r/toycameras
SeaFrogs Waterproof Underwater Camera Case for Olympus TG5 with 67mm Red Filter | eBay
KitDive 67mm Red Filter for underwater photography (Wet) – seafrogs
Amazon.com : GEPULY Waterproof Housing Case Filter Kit for GoPro Hero 7 White Hero7 Silver Camera 40M Underwater Diving Housing Case + Red Filter + Light Red Filter + Magenta Filter + Anti-Fog Inserts : Electronics
Amazon.com : Camera Red Filter Professional Optical Glass Underwater Diving 58mm Red Filter with 16X Macro Lens for Gopro5 Action Camera : Electronics
Amazon.com: Zomei 5 in 1 Universal 37mm Cell Phone Clip-On Graduated Gray Orange Blue Red Filter Kit Camera Lens with Universal Clip for iPhone Huawei Samsung Xiaomi Smartphones : Cell Phones &
Polar Pro Aqua Series Red Filter For GoPro Hero3+, Hero4 with Standard Housing
Amazon.com : Apexel 52mm Filter Lens Kit (Graduated Filter Lens-Red Orange Yellow Blue, CPL, ND32, Star Lens-6 Point) for Smartphone Camera Canon Nikon Sony Olympus : Electronics
Amazon.com : Underwater Housing Red Filter for GoPro HD Hero 3 : Underwater Camera Housings : Electronics
RED filter for gopro Filter Kit with DIVE Filter for GoPro HERO 5, 6, 7, 8, 9, 10, 11 - AliExpress
Amazon.com : VVHOOY Waterproof Case Dive Housing Protective Underwater Dive Case Shell with 3 Pack Red Filter Compatible with AKASO EK7000/EKEN H9R/REMALI/FITFORT/DROGRACE WP350 Action Camera : Electronics
Amazon.com : Red Filter for OSMO Action: Includes 60m (196ft) Housing & 3 Filters - Laser Cut Contrast Enhancement Glass - Includes Red, Magenta, & Snorkel Filter [60M HOUSING with Low Iron
Red Filter - Red Filter - 27mm Dark Red Camera Lens Filter (29) (Special Order) - Heliopan US
Soonsun Filter Kit For Gopro Hero 10 9 8 Black Magnifier Red Magenta Pink Diving Color Filters For Housing Case Accessories - Camera Filters - AliExpress