I guess many of us were waiting for this: the possibility to use Sigma's excellent…
Canon EF 200-400mm f/4L IS USM Extender 1.4x Eventually Set To Be Released
It is good to follow Canon Singapore on Facebook. This weekend (4-6 January) they will held a convention at the Cathay Orchard Cineleisure in Singapore, and they tease the event on Facebook:
Be one of the first to check out the soon to be launched EF 200-400mm f/4L IS USM Extender 1.4x at the EOS Experience Roadshow happening this weekend! We’ll be at Cathay Orchard Cineleisure this 4-6 January from 11am-10pm! See you there!
Ok, “soon to be launched” could mean this weekend, and also in a few weeks, or months, who knows. We are patiently waiting! :-) Pre-orders are yet not possible.