Anybody owned, or used the Canon 400mm f/4 DO IS II on....

John Sheehy wrote:

Stuart Carlton wrote:

Hardly ever off my R5 with 1.4iii extender. Very acceptable IQ, in fact reasonably comparable with the 500f4 i I had previously, (just couldn’t carry that around any more!) I have also used it in good light with 2xii with acceptable results. Much easier for BIF than the bigger primes! The bokeh is sometimes a little odd depending on background proximity.

Yes, the lens certainly works best when there's nothing in the scene about 1.25x to 2x as far away as the subject.

While using the lens a couple of years ago, I had an Eastern Phoebe perch on top of 4 different wildflowers coming toward me, and the other twigs behind the Phoebe were all wiry-looking with some doubling when it was at the most distant, but as I took a new set of shots each time it got closer, the background got smoother and smoother. I'd seen smooth and wiry backgrounds before, but being the same bird, and looking through all the review images at the same time, it became very obvious.

In the spring of 2020, I had two coyotes behind my home, on the ridge under a power line, and I took photos of them walking the ridge, but the reeds 25 to 50 feet behind them all looked like they were ghosted/doubled. One of my few times to see coyotes that weren't running away from me, but with a very non-ideal distance from the background.

Thanks for that! So it is a feature instead of being a problem with my lens.