Yes I have been using the new 1.4X as it came in a kit deal from Sigma. AF is slightly slower when using this but acceptable in half decent light. Sometimes struggles a bit in sub optimal conditions. I have the USB dock so will experiment when I have some time spare.
IQ is pretty good too. You can see a minor degradation but it's acceptable for the price.
I did have the previous 1.4 and 2x Sigma TC's with the 120-300 2.8 Sport when I got my first 1DX and they were not as good. That was a corker of a lens but just too heavy for carrying to sports events. Great on a Gitzo though. Canon 1.4 III has superior AF with the 100-400 IS II.
Whether you consider a description to be factual is irrelevant.
If a post is reported, by the person to whom it is directed, or another person, it is our job to investigate.
That is all it needs, someone to report a post.
Its the interpretation of your posts, by The Moderation Team, that decides your future on the forum.
These are the facts & not a request for a debate.
I have D Quinn on 'ignore', as he's a thoroughly nasty piece of work, as evidenced by the things he's said about me on the HiFiSubjectivist (run by Richard Dunn of NVA) forum, of which I'm not even a member. I only know about it as somebody sent me a link, and he's called me a LOT worse there than 'bald bloke'.
Thanks for picking it up, but it won't be the last time, I think. For some reason I've got right up his nose, and I put him on 'ignore' as I really don't want to encourage him by entering into an argument with him
The total comes to £9.50 inc postage (probably send them separately to avoid the jewel case breaking).
My emails from last time see to be missing. Can't remember how you paid last time. Was is a gift payment or bank transfer?
Will also need your postal address again.