It is a superb lens - pity it is so expensive.
AlanF, just curious, I know you own the 300 f/2.8. Since the new 400 DO II is only $300 more expensive, do you feel the 300mm is "so expensive," as well? In other words, how do you rate the relative value of these two lenses, given their fairly large differences in focal length, aperture and weight--but relatively small difference in cost?
I'm looking to step up from the 400L f/5.6 primarily because I want IS, and I'd certainly appreciate that extra stop. I could get the new 100-400L II, but since my lighter and more compact 70-300L is my go-to travel lens, I think the 100-400 would remain parked at 400. For these reasons, price aside, the new 400DO II is awfully appealing.
Finally, CR claimed the 400 DO's were going to start shipping on Dec 18th, but I've yet to see one show up anywhere online for sale. B&H shows two "user reviews," but Adorama and Amazon show none. LensRentals says you can pre-reserve one, so they don't have one yet, either. When Canon originally announced the lens, it was supposed to start shipping in Nov 2014, but thus far seems like vaporware. Has anyone heard anything about Canon's actual ship date?
Sorry, I missed this post and apologise for the delay in answering. The price for the 400 DO II at Wex in the UK is £6999, that for the 300mm/2.8 II is discounted to £4899. So, there is a huge price differential here.
Even if the price were the same, it would be a difficult choice. Firstly, the weights are pretty close, 2350g vs 2100g, and they are both amazingly sharp. Secondly, you have to balance how much you would like 300mm at f/2.8 vs 400mm at f/4. Thirdly, I would guess that my most used combination would be either the 400+1.4xTC or the 300+2xTC, with little too choose between them. However, I have been playing around with the 100-400 II plus 2xTC using live view at f/11 on the 7DII, and am very impressed with 800mm!
Having the 100-400 II does confuse the issue even more. I would dearly like to have the DO as well, but it would be difficult to justify for a second-rate amateur like me.