|Canon EF 100-400mm f/4.5-5.6L IS II zoom lens|
Late last year, I reported Canon has filed a patent for the EF 200-600mm f/4.5-5.6 IS super zoom lens. Word is Canon may now be ready to release this lens to compete with the Sigma and Tamron 150-600mm models on the market.
Unless, the new lens comes in the professional 'L' grade model, the price point (presumably just slightly higher than or equal to the competing third party models) will not make economical sense for Canon to make the lens a great weather-sealed performer. I am not impressed by the current 'super zoom' models on the market. Adding the Canon name to another consumer model will not make it any better, albeit perhaps a solid performer for its price. There may even be a custom extender as an option to add on the new glass.
The current EF 100-400mm f/4.5-5.6L IS II is a great performer. Even with a 1.4x extender added, the image is still quite acceptable. I hope Canon will release the EF 200-600mm in the 'L' grade and the EF 600mm f/4 DO BR some time this year. I will be a buyer of both glass. You can see my equipment bag and works on MichaelDanielHo.com