EF 100-400mm f/4.5-5.6L IS II USM Review WOW!

digital paradise wrote in post #18658493
I've give that a try just to see. I can't see using it much.

Dont hold me to it but I think when I was testing my 1.4iii and 2.0iii on my 100400ii I still had a little AF in LiveView when AF in the viewfinder had run out.

chuckmiller wrote in post #18658499
Dont hold me to it but I think when I was testing my 1.4iii and 2.0iii on my 100400ii I still had a little AF in LiveView when AF in the viewfinder had run out.

I don't see how you could do AF in Live view when handholding with the 100-400 II mounted.

Wrong thread but just an update. Again the shooting conditions were rough with the wind. Trying to keep the SS low for prop blur was not easy.

The red plane SS was 1/100

digital paradise wrote in post #18658380
AF speed

A sharp lens that is slow to focus is of no use to me as I like to capture birds in flight. Prior to the introduction of the EOS-1D X, Canon electronically slowed down the AF servo drive speed when either 1.4X or 2X extenders were attached to account for the loss of light, that is as 50% with the 1.4X extender and 75% with the 2X extender. The significant reduction in servo drive speed, especially with the extender 2X, limited its application for bird in flight photography. Canon changed this equation with the introduction of the EOS-1D X and series II super-telephoto lenses. When using a series II super-telephoto lens and a series III extender, the EOS-1D X user will not notice a reduction in the servo drive speed with either 1.4X or the 2X extender. (Note that is not true for any other camera or lens combination that I have used). This means that when attached to an EOS-1D X, the EF 400mm f/4 DO IS II plus EF Extender 2X III can potentially be a great combination for shooting birds in flight.


http://arihazeghiphoto​graphy.com …ttle-of-the-light-lenses/

Does this also hold true with the 1DX MK II ?

Archibald wrote in post #18658510
I don't see how you could do AF in Live view when handholding with the 100-400 II mounted.

Who said I was handholding, but yes I think I was, maybe.

chuckmiller wrote in post #18659335
Who said I was handholding, but yes I think I was, maybe.

So were you or weren't you?

itw wrote in post #18659292
Does this also hold true with the 1DX MK II

Yes. That blog was before the 1DX II I think.

digital paradise wrote in post #18659542
Yes. That blog was before the 1DX II I think.

Thanks !

itw wrote in post #18659595
Thanks !

Actually I think I read somewhere else that applies to the 1DX II which would make sense. They wouldn't dumb it down but you never with know with Canon

digital paradise wrote in post #18659927
Actually I think I read somewhere else that applies to the 1DX II which would make sense. They wouldn't dumb it down but you never with know with Canon

Ain't that the truth !

Lame-Duck wrote in post #18658047
John, I'd definitely say, "stay with the 1.4 TC, and don't get the 2X II. I can almost guarantee you won't be happy with it. I've tried my Canon 2X III TC on mine, and was not happy with image quality, plus I loose two f stops (have to shoot at f/11). I also have to manually focus with both the 7D mkII and 5D mkIV. My 1.4X TC III, does a great job, but my widest aperture is f/8 (I can live with that), and I can't use all my focus points. Only the single point focus, and the single point assist will work with the 1.4 TC III.

Since I like to shoot BIF, I rarely us a TC, but for static shots, it can be great.

My stupid blunder....Yes I can use all the focus points. Sorry for the misinformation.

I'll second everything stated here, infact, I Think the ONLY people that are genuinly happy with a 2x (any version) I've seen over the years are those running the top dollar big whites: 300 f2.8 / 400 f2.8 / 500 f4 / 600 f4; otherwise the only exceptions would be tripod/stopped down/plus enough time to manually focus/ponder the meaning of life.

The 1.4xIII is really what you want, try one out, works good on the 100-400 II, just don't expect miracles when it comes to F8 AF unless you're using the 1dx II / I, otherwise there are compromises when it comes to distracting backrounds. Personally, I ditched the 1.4xIII on my 5dIV setup, traded "down" to a 70d and found that the results are shockingly better, and recently moved to the 80d on the bare lenses and even happier (not happy it shows EVERY flaw because of the insane pixel density!).

markesc wrote in post #18660977
I'll second everything stated here, infact, I Think the ONLY people that are genuinly happy with a 2x (any version) I've seen over the years are those running the top dollar big whites: 300 f2.8 / 400 f2.8 / 500 f4 / 600 f4; otherwise the only exceptions would be tripod/stopped down/plus enough time to manually focus/ponder the meaning of life.

The 1.4xIII is really what you want, try one out, works good on the 100-400 II, just don't expect miracles when it comes to F8 AF unless you're using the 1dx II / I, otherwise there are compromises when it comes to distracting backrounds. Personally, I ditched the 1.4xIII on my 5dIV setup, traded "down" to a 70d and found that the results are shockingly better, and recently moved to the 80d on the bare lenses and even happier (not happy it shows EVERY flaw because of the insane pixel density!).

Chris---Your reply is really great. I subscribe to everything you have to say. I too prefer using my 80D with bare lenses over a 1.4xIII. But I will use the 1.4TC when shooting static shots (and need the extra magnification), and for the most part, I've had decent results.

digital paradise wrote in post #18658169
Just to add to the conversation. Today I also shot with my 5D4, 400 DO II and 2X. Tough on moving targets. Keeper rate was pretty bad but the conditions were not great. Hard enough to keep 800mm hand held steady on a calm day. I felt like a sail in the wind. I have come back with BIF shots with that combo every time I have gone out. I posted some with the 1.4 on the 5D4 thread and I'm still looking for something to post with the 2X.

Something to consider purchasing/using a TC.

Change in lens AF speed with EF Extenders

This last point (directly above) has created sufficient misinformation that it warrants a separate explanation. With a 1.4x Extender attached, the amount of actual focus movement within a lens is reduced by 50%, in order to accommodate changes in actual subject distance. With a 2x Extender attached, the amount of movement of lens elements is reduced by 75%. Because AF systems are essentially computer-controlled to read and react to focus distance changes, the information must be modified so that the focusing movement (or sensitivity) compensates for the added presence of the extender. In the Canon EOS system, this is done by deliberately reducing drive speed when an extender is detected.


https://learn.usa.cano​n.com …14/ef_extenders​_pt2.htmlp

This no longer applies when you use modern lens, MkIII T-Cons and the most current bodies.
This is "how it was" since T-cons in the 1990s up until the latest stuff only available in the last few years.
If a forced slow down remains at all, it is so small so as to be no longer perceptible for me.

i have two 70D's; do they count as 'modern' bodies?

I don't want to waste my money getting a vIII teleconverter.

TIA