Canon has released new firmware for the Canon EF 400mm f/4 DO IS II USM, which fixes an issue with the IS jumping.
Firmware Version 1.0.9 incorporates the following fix.
- Fixes a phenomenon, in rare cases, the IS mechanism may cause the image to jump.
Download firmware v1.0.9 at Canon USA
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EF100-400mm F4.5-5.6L IS II USM Firmware Version 1.0.7 :
"Fixes a phenomenon, in rare cases, the IS mechanism may cause the image to jump."
I try the new FW, it work perfectly
I just asked the same question over in the 100-400L II Firmware thread.
I've never seen this "jumping" phenomenon.
On a separate note - how would those of you who own/have owned this lens rate it against the IQ of the 100-400L II. How well does it take extenders?
The f4 is appealing and it looks like it's a pretty light lens. (relatively)
I never owned the 100-400 II at the same time as the 400 DO II but did own the DO version 1 and the 100-400 II at the same time when I was shooting with the 5DIV. The 1.4x TC III lived on the 400 DO I for me and I absolutely loved that lens till I got the DO II which is no doubt better. I liked the DO I more than the 100-400 II other than it's MFD.
I will say I am disappointed at the the 400 DO II on the R5 when it comes to shooting birds in flight. I feel like for whatever reason be it the camera or lens the the auto focus is just a little bit behind. It's like the R5 just can't drive the the lens fast enough. For Static subjects I have no complaints. The 400 DO II is not on the list of lenses in the R5 manual that get 12 FPS but the H+ icon is solid green with a fully charged battery. I also don't find that I get anywhere near the same IS performance with it that I do with the RF 800 or RF 100-500. My disappointment in the 400 DO II is based on having the the RF 100-500 and the RF 800 which are both amazing to me and batter than I expected.
The RF 1.4x TC is also so much better than I expected. A lot of the time I use the DO II with the 2x TC so 800mm f8 feels comfortable to me and the way I shoot. A 700mm f10 and 1120mm f16 are so much more usable than they sounds and you still have full eye AF, subject detection and tracking.
I don't really want to be with out a fast telephoto for those times where there is no light but I do have my DO II for sale and will likely just do without till there is an RF equivalent comes out.
Another great answer - thank you.
I'm waffling but I think I'm going to go with the 100-500L and the new RF 1.4X..
Great answer as well and thanks very much!
Same for me, too expensive and 400 2.8 ii is too heavy for travel..
The 400 DO is fine with closer subject for me. When i shoot something far away this is not quite sharp.. i don’t know if it will be better with a 400 2.8 in the same condition or if i except too much from the lens, maybe?!...
I was thinking about the 100-500 for the weight gain but 7.1 is hard at sunset/sunrise and in the woods.. i would like to see future RF Telephoto lens..
I am tempted slightly to try a used copy, but it's against my better judgement.
Edit - just seen you have posted there.