Official 1dx Mark III owners unite! Post photos and discuss.

I discovered two new things this past weekend/

Stacking 1.4X MKIII with 2X MkII ( the older MkII allows stacking physically )

With the 500mm @ f/11 the 1DXIII still tries to AF in Phase Detect autofocus with the optical viewfinder. The 1.4X ends up unreported and the camera displays f/8 even though it is at f/11. Stop down to something smaller than f/11 and it will report accurately.

As I say, it does try to AF, and it does hit some times. On my set up there was profound front focus, but I've never MFAed any of it, it's not surprising that stacking with the old 2X would have sketchy results. what is surprising to me is that it actually tried t AF and succeeded to some extent.


Live view, 20FPS electronic shutter:
I've left my 1DXIII set to electronic shutter only when shooting high speed 20 FPS, partly for what may be a silly reason, but I figure why not take advantage of reduced wear and tear on the shutter assembly? the disadvantage, you are really totally unaware of the impact/duration of those 20FPS bursts! It really is silent and astounding.

CyberDyneSystems wrote in post #19024102
I discovered two new things this past weekend/

Stacking 1.4X MKIII with 2X MkII ( the older MkII allows stacking physically )

With the 500mm @ f/11 the 1DXIII still tries to AF in Phase Detect autofocus with the optical viewfinder. The 1.4X ends up unreported and the camera displays f/8 even though it is at f/11. Stop down to something smaller than f/11 and it will report accurately.

As I say, it does try to AF, and it does hit some times. On my set up there was profound front focus, but I've never MFAed any of it, it's not surprising that stacking with the old 2X would have sketchy results. what is surprising to me is that it actually tried t AF and succeeded to some extent.


Live view, 20FPS electronic shutter:
I've left my 1DXIII set to electronic shutter only when shooting high speed 20 FPS, partly for what may be a silly reason, but I figure why not take advantage of reduced wear and tear on the shutter assembly? the disadvantage, you are really totally unaware of the impact/duration of those 20FPS bursts! It really is silent and astounding.

How was the IQ on the images when stacked. Did you see any image quality loss. Robamys are very impressive. Im more interested in what the straight offs look like

CyberDyneSystems wrote in post #19024102
I discovered two new things this past weekend/

Stacking 1.4X MKIII with 2X MkII ( the older MkII allows stacking physically )

With the 500mm @ f/11 the 1DXIII still tries to AF in Phase Detect autofocus with the optical viewfinder. The 1.4X ends up unreported and the camera displays f/8 even though it is at f/11. Stop down to something smaller than f/11 and it will report accurately.

I'm not sure what you mean by that.

If you over-dial the f-ratio control well past the open position, to guarantee that the camera is selecting the maximum aperture, and then click down the aperture one step at a time, you start at f/8, but how does the series go?

8 9 10 11 13 14 16 etc?

8 13 14 16 18 20 22 etc?

Maybe something weird like:

8 8 8 8 9 10 11 13 etc?

umphotography wrote in post #19024121
How was the IQ on the images when stacked. Did you see any image quality loss. Robamys are very impressive. Im more interested in what the straight offs look like

IQ is impacted, but it looks to me as if the in focus area (about 1/4-1/2 in front of where I want it to be) is not bad at all. DOF is razor thin though. This is full size jpeg;
https://jakehegnauer.z​enfolio.com/img/s/v-10/p3852061470.jpg

John Sheehy wrote in post #19024187
I'm not sure what you mean by that.

If you over-dial the f-ratio control well past the open position, to guarantee that the camera is selecting the maximum aperture, and then click down the aperture one step at a time, you start at f/8, but how does the series go?

8 9 10 11 13 14 16 etc?

8 13 14 16 18 20 22 etc?

Maybe something weird like:

8 8 8 8 9 10 11 13 etc?

It progresses just as it normally would. (ie, your first example) I was thinking that it wasn't actually doing anything until it got past f/11,. but in hindsite I am probably wrong. It likely is stopping the aperture down, the lens goes from f/4 to f/4.5, the 2X makes that f/9, the 1.4x makes it f/13, but it's reading f/9 and just always off by that stop of the unreported 1.4x. Funny I've been doing this for nearly 20 years and never considered it.

I should test it sometime,. it would be easy to tell, just see when the shutter speed is effected in AV mode.

CyberDyneSystems wrote in post #19024306
IQ is impacted, but it looks to me as if the in focus area (about 1/4-1/2 in front of where I want it to be) is not bad at all. DOF is razor thin though. This is full size jpeg;
https://jakehegnauer.z​enfolio.com/img/s/v-10/p3852061470.jpg

It progresses just as it normally would. (ie, your first example) I was thinking that it wasn't actually doing anything until it got past f/11,. but in hindsite I am probably wrong. It likely is stopping the aperture down, the lens goes from f/4 to f/4.5, the 2X makes that f/9, the 1.4x makes it f/13, but it's reading f/9 and just always off by that stop of the unreported 1.4x. Funny I've been doing this for nearly 20 years and never considered it.

I should test it sometime,. it would be easy to tell, just see when the shutter speed is effected in AV mode.

Thanks Jake

not to shabby considering it was stacked. That would clean up nice......now the $64 question

what would the 1Dx2 look like same set up

You know what I just bought so Im going to find out

For those with Sigma Art lenses, does the camera focus as quickly , or at least quicker than the old model?

CH_Devin wrote in post #19024331
For those with Sigma Art lenses, does the camera focus as quickly , or at least quicker than the old model?

The only SIGMA I have now is the 150-600mm "C". It focuses well, but other than the amazing new tracking advantages, it didn't seem any faster than the 1Dx MkII

A Merganser on the wing, no trouble tracking even with the distracting background.
This is a 100% crop (approx 1500 on the wide side)

IMAGE LINK: https://jakehegnauer.z​enfolio.com/p988945897​/ee5ccd396

CyberDyneSystems wrote in post #19024102
I discovered two new things this past weekend/
Stacking 1.4X MKIII with 2X MkII ( the older MkII allows stacking physically )
.

In case you are not aware, you can stack MKIII TCs if you use a 12mm ext tube between them.
With 1.4 on the camera and 2x on the lens I have always maintained infinity focus with several lenses.

umphotography wrote in post #19024318
Thanks Jake

not to shabby considering it was stacked. That would clean up nice......now the $64 question

what would the 1Dx2 look like same set up

You know what I just bought so Im going to find out

Not as good but still OK. V2 is sharper wide open. With stacked 1.4 and 2x, f11 is wide open.
So stopping down to f5.6 for some extra sharpness means f16 with TCs.
Lens at f8 better again but that means f22.

I have Sigma 500 f4 which is comparable to EF 500 II. On 1DX2 I can get good results with stacked TCs but it is very difficult. With EOS-R it was much easier but it still becomes obvious even my 5 series Gitzo is less than totally stable.

Some random photos from today.

2Slo - This is exactly the sort of Blue Tit image I have been after for years! Still waiting for my 1DXIII pre-order to arrive and seeing shots like this just increase the anticipation especially as we have Blue Tits in the garden currently building their nest in my home made nest box complete with inbuilt Raspberry Pi camera.

Alan

I am back from the short Florida trip. Weather was not good for almost the entire trip. The winds where very strong, had an Osprey boat tour cancelled due to the wind. Overall we made the best of it. The 1dx Mark III performed very well on the trip. I did have two freeze ups, quick pull of the battery and good to go again. The biggest improvements I have noticed is how well the 2x on the 600mm tracks now. The 400mm DO also is much faster with the 2x on it over the 1dx Mark II by a lot. I did not use that lens much but when I did it performed very well. The AF hands down is improved over the the 1dx Mark III. Here are a couple many more to come.

840mm handheld

IMAGE LINK: https://flic.kr/p/2iDc​aWv

IMAGE LINK: https://flic.kr/p/2iDc​adM

IMAGE LINK: https://flic.kr/p/2iDe​2aj

CyberDyneSystems wrote in post #19024306
It progresses just as it normally would. (ie, your first example) I was thinking that it wasn't actually doing anything until it got past f/11,. but in hindsite I am probably wrong. It likely is stopping the aperture down, the lens goes from f/4 to f/4.5, the 2X makes that f/9, the 1.4x makes it f/13, but it's reading f/9 and just always off by that stop of the unreported 1.4x. Funny I've been doing this for nearly 20 years and never considered it.

That sounds like the behavior has not changed in reporting, then.

I have often wished that manufacturers gave an option to manually chose a number of stops down from wide-open, instead of the f-ratios. That would be more intuitive when swapping TCs in and out, IMO. I have often wondered how many times someone gave a bad report on TC use because their lens is sharpest a stop down from open, and when they swapped in the TC, the lens opened up all the way to its aberrations, due to a maintained f-ratio.