Vello Canon EF/EF-S Lens to Micro Four Thirds-Mount LA-MFT-CEF
Amazon.com : Canon EOS & Rebel Series 2X Teleconverter for EF & EF-S Lenses : Electronics
Canon 1.4X EF Extender III Teleconverter (L Series Tele/Zoom Lenses) at KEH Camera
Amazon.com : Teleconverter 2.0X (Doubler) Extender for Canon EOS & Rebel Series (EF & EF-S Lenses) Black : Electronics
Viltrox C-AF 2X II TELEPLUS Teleplus Autofocus Teleconverter 2.0X Extender Telephoto Converter for Canon EOS EF lens 7DII 5D IV - AliExpress
Viltrox EF-L Auto Focus Lens Mount Adapter For Canon EF/EF-S Lens Matc
VILTROX C-AF 2X II Auto Focus 2.0X Teleconverter Lens Converter for Ca
Mashup: Weird lens week] No Brand EF-S 2X extender with 55-250 STM IS f/5.6 on Canon t6i @ 500 mm equivalent. Only 2X EF-S (not EF) extender out there? : r/canon
Commander Optics Super 500mm / 1000mm (with 2X Teleconverter) f/8 Manual Telephoto Lens for Canon EOS EF-S DSLR Cameras + T-Mount + Monopod & Lens Bag - Walmart.com