Canon EF 100-400mm f/4.5-5.6L IS II USM Lens $2100. Canon EF 300mm f/4L IS USM Lens $1350. Canon EF 400mm f/5.6L USM Lens $1150. Canon Extender EF 1.4X III $425 . Prices are off the top of my heard but I believe they are pretty close. There might be rebates I don't know about. There is always used sources and the Canon refurb store. That totally sucks I was so hoping it would be compatible and able to push up to 2.8:1 with the teleconverter / extender, as I love using my 2x teleconverter with the EF 100mm f/2.8L is usm macro lens I've got atm to push up to 2:1 Explore the Canon Digital Learning Center to find everything ranging from buying guides to training courses. It features a built-in microcomputer for seamless communication among camera body, lens and extender, features careful lens placement and coatings to minimize ghosting, flare and chromatic aberration, and even has a new Fluorine coating that keeps soiling, smears, fingerprints to a minimum. Extender EF 2X III meets necessary standards in terms This appears to be a direct knockoff of the Canon 2.0x III Extender which costs 2.5x as much. I tested this against the Kenko 2x Pro 300 teleconverter (which is one of the best) and by comparison this has better corner sharpness and much reduced chromatic aberrations. While the Canon version of this teleconverter costs $449, Yongnuo is selling its clone for just $180 over on Amazon. Yongnuo YN-2.0X III Teleconverter [Amazon via CanonWatch ] Equipment , News jdy3iL. It features a built-in microcomputer for seamless communication among camera body, lens and extender, features careful lens placement and coatings to minimize ghosting, flare and chromatic aberration, and even has a new Fluorine coating that keeps soiling, smears, fingerprints to a minimum. Extender EF 2X III meets necessary standards in terms

canon extender ef 2x iii compatibility