Canon EF 400mm f/4L IS DO II USM

Also worth noting that I played around with the micro focus adjustment in the field and settled on +1 as being centre for DOF on my copy of the lens

Sorry so late we are overseas, but a big congrats to you on this amazing lens! You're already nailing with it

I also have 100-400ii, keeping it and the 400DOii. Each has an advantage/disadvantage compared to the other.
In my eye at 400 both are clinically insignificant the difference in sharpness. For me it is all about the doubling of light
possible with the DOii. In some cases though the inability to zoom or de-zoom with the feet will still favor the 100-400ii.
Nice to have choices.

I'm thinking I'll sell the 100-400 and buy the new 300 f4 PRO for my mirrorless OLY. I rarely used the zoom anyhow, and the small amount of dust it sucks up messes with my brain even though I know it doesn't affect image quality.

Gadgetvet, Poof (the better half) has the Oly 300/4 and I have the Leica 100-400; we are often comparing them. I take the Leica everywhere everyday...it's here in Iceland with me as I type. We were in the swamps of Florida a couple of months ago and on a boardwalk. I got the shot, she did not because there was no way for her to move forward or backward without being in the drink. No doubt it's a phenomenal lens, she's let me shoot with it and obviously can go lower in light than I can with the Leica...just something to think about.
I do believe (just me) that either the Oly or the Leica can out resolve the mFT sensors. There is just so much one can do with mFT, that said I'm very satisfied with the 100-400, here's one a few days ago on the northeast coast-
https://www.flickr.com …7127567071/in/d​ateposted/

Time for a couple more. First up a Euro Green Finch looking a bit shadowy. Second a local farm cat. Viscous little sod called Peter. Loving the lens so far. Really is what I was looking for, nice and light for long hikes round the local area and great for hand holding for those times when you are waiting for a bird to turn its head and are staying on target. MFA´d it a tad (+2) which seems to be par for the course on my 7D2 as my 100-400 is +3. I first used my normal method for this, a can of coke on some block paving and ended up at +2 then decided to give dottune a try for the first time and it worked out at +2 as well so I´ll probably stick to coke cans .

Just found this thread, thanks, Medicine Man. I never before thought of Cattle Egrets as subjects, but they have their own charm. These are handheld, modest crops.

Fantastic imagery. Love the first and welcome to the DO club.

Not the best shot, but it's been so long since I got anything 1/2 decent that was not at the zoo. Used my Better Beamer for the first time since I got it for Christmas.

With the sigma 2x and heavy crop to 9Mp.

So that is what 1200mm equivalent? ?? Mighty good if you ask me.

Well 800mm with 1.6crop sensor and 2x manual crop, you could argue it is 2500mm effective, but yes 1280 without cropping.

Chestnut-sided Warbler
1D X Mark II | EF 400mm f/4 DO IS II USM | 1/250 | f/9 | ISO 160

Finally home after 3+ weeks traveling (no Canons were taken). Glad to see no one broke in. Better our little birds out back didn't forget us nor did the
hawk-saw him coming in to get a piece of chicken while I was putting out seed for the little ones. The EOS 1DXii is still here too
and I want to ply the 400DOii on it soon.

Welcome Back!tthe 400DOii/1DXii combination is amazing. Unlike my 7Dii it nails the focus on every image. I think it it may be the ultimate Point 'n Shoot . Look forward to seeing your results..

Thanks Coderunner. But first back to work for a week Then more play time.