To put it another way - re 5DIII AF

Started Mar 8, 2012 | Discussions
Dr. Leonard Senior Member • Posts: 1,333
To put it another way - re 5DIII AF

Do the specs on the 5DIII AF indicate an ability for action shots as good as the 7D (or MkIV)? Or do we just have to wait for testing?
--
Descartes in math class - "I add, therefore I sum."

Canon EOS 5D Mark III Canon EOS 7D
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amobi
amobi Veteran Member • Posts: 3,113
Re: To put it another way - re 5DIII AF

I hope it is not as good as 7D.

Dr. Leonard wrote:

Do the specs on the 5DIII AF indicate an ability for action shots as good as the 7D (or MkIV)? Or do we just have to wait for testing?
--
Descartes in math class - "I add, therefore I sum."

Skip M Veteran Member • Posts: 7,174
Re: To put it another way - re 5DIII AF

Dr. Leonard wrote:

Do the specs on the 5DIII AF indicate an ability for action shots as good as the 7D (or MkIV)? Or do we just have to wait for testing?
--
Descartes in math class - "I add, therefore I sum."

Given idiosyncrasies of Canon's AF in the last couple of 1D/1Ds cameras, I'd wait until some real world testing has been done before I'd try to draw firm conclusions about the AF. That being said, 41 available cross type sensors, and 61 total available sensors, should be better than the 7D. Focus tracking should be better with more and better focus points to hand off a moving target to..
--
Skip M
http://www.shadowcatcherimagery.com
http://www.pbase.com/skipm
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'Living in the heart of a dream, in the Promised Land!'
John Stewart

John_A_G Veteran Member • Posts: 7,614
Re: To put it another way - re 5DIII AF

Dr. Leonard wrote:

Do the specs on the 5DIII AF indicate an ability for action shots as good as the 7D (or MkIV)? Or do we just have to wait for testing?
--
Descartes in math class - "I add, therefore I sum."

Canon's goal appears to be that it will perform better than the 7d. The focus array is improved. The algorithms based upon 1-series.

However, don't expect AF to be better in all cases vs. 1dIV. The new 5dIII does NOT have a dedicated processor for focusing like the 1dIV and 1dX (and other 1-series cameras before it does).

So, it doesn't have the same JUICE as the 1dIV.

But, it is entirely possible that the focus array and algorithms allow for better accuracy in certain circumstances.

So, it's safe to say 5dIII won't be as good as 1dx. I think you can expect it to be better than 7d. the tougher question is whether it's better than 1dIV.

amobi
amobi Veteran Member • Posts: 3,113
Re: To put it another way - re 5DIII AF

John_A_G wrote:

The new 5dIII does NOT have a dedicated processor for focusing like the 1dIV and 1dX (and other 1-series cameras before it does).

Wrong. It has dedicated processor as in 1DX.

stephenmelvin Veteran Member • Posts: 4,547
actually...

amobi wrote:

John_A_G wrote:

The new 5dIII does NOT have a dedicated processor for focusing like the 1dIV and 1dX (and other 1-series cameras before it does).

Wrong. It has dedicated processor as in 1DX.

No, it doesn't. The 1Dx has two DIG!C 5+ processors for its main processing, and one DIG!C 4 processor dedicated to the AF.

The 5D Mk III has a single DIG!C 5+ processor to handle everything.

Still, I expect it'll have excellent AF performance.

altenae Regular Member • Posts: 377
Re: actually...

NO NOT WRONG

The 5d MArk III has a dedicated processor just like the 1dX
Please do your homework
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Enjoy Photography
http://www.wildlife-photos.net

altenae Regular Member • Posts: 377
Re: actually...

Answer from Chuck Westfall (You can also reasd this in spec. list of the camera on the Canon site)

The DIGIC 4 in the 1D X is used for that camera’s 100,000 pixel RGB metering sensor. It is not a dedicated AF microprocessor. Both the 1D X and the 5D Mark III use dedicated AF microprocessors; these AF microprocessors are not DIGIC chips.
--
Enjoy Photography
http://www.wildlife-photos.net

stephenmelvin Veteran Member • Posts: 4,547
Re: actually...

altenae wrote:

Answer from Chuck Westfall (You can also reasd this in spec. list of the camera on the Canon site)

The DIGIC 4 in the 1D X is used for that camera’s 100,000 pixel RGB metering sensor. It is not a dedicated AF microprocessor. Both the 1D X and the 5D Mark III use dedicated AF microprocessors; these AF microprocessors are not DIGIC chips.

And the 1DX uses the 100,000 pixel RGB metering sensor for focus tracking.

altenae Regular Member • Posts: 377
Re: actually...

The Question is :

Is there a dedicated processor for the AF on the 5d MArk II

The answer is: YES

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altenae Regular Member • Posts: 377
Re: actually...

Abcourse I meant 5d MArk III

And the 1DX uses the 100,000 pixel RGB metering sensor for focus tracking

The 1Dx is the only Canon camera which has this feature.
Not even the 1D Mark IV has this.

tony field Veteran Member • Posts: 9,305
taste the pudding first

The only proof is when you taste the pudding.

I suspect the 5D-III will at least match the focus ability of the 1D-III and 1D-IV for first frame acquisition. In other words, excellent indeed. (For me, this is all I need - I shoot sports, dance, and other moving subjects single frame only).

How it works for multi-frame track focusing is another issue. The 1D-III was "pretty poor" (compared to the 1D-II) and only somewhat better on the 1D-IV.

On paper, the 5D-III should have excellent focus ability in low light - for me, important, although the 5D-II is pretty fine indeed and the 1D-IV is better.
--
tony
http://www.tphoto.ca

John_A_G Veteran Member • Posts: 7,614
Re: actually...

from DPR's preview:

"It's not the entire 1D X AF system - because the 5D Mark III doesn't have the 1D X's 100,000 pixel metering sensor to gain tracking information from, nor a dedicated DIGIC 4 processor to make sense of it all."

From the Canon 1dx press release:
"...and a dedicated DIGIC 4 for metering and AF control."

So, was canon's press release on the 1dx - where they said there is a dedicated digic 4 for metering incorrect?

Ubiquity99 Regular Member • Posts: 138
Re: To put it another way - re 5DIII AF

Nevermind.

altenae Regular Member • Posts: 377
Re: To put it another way - re 5DIII AF

http://cpn.canon-europe.com/content/education/technical/inside_canon_eos_5d_mark_iii.do

Go to the AF system section and open this.
Here you find the following:

Achieving this speed and accuracy in the AF algorithm requires a large amount of focus data to be processed quickly. This has been done by the use of distributed processing where both a dedicated AF processor and a camera CPU process data. The dedicated AF processor is four times faster than the one found in the EOS-1D Mark IV

SO it is a dedicated cpu for AF
I guess Canon knows best.

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Skip M Veteran Member • Posts: 7,174
Re: To put it another way - re 5DIII AF

altenae wrote:

http://cpn.canon-europe.com/content/education/technical/inside_canon_eos_5d_mark_iii.do

Go to the AF system section and open this.
Here you find the following:

Achieving this speed and accuracy in the AF algorithm requires a large amount of focus data to be processed quickly. This has been done by the use of distributed processing where both a dedicated AF processor and a camera CPU process data. The dedicated AF processor is four times faster than the one found in the EOS-1D Mark IV

SO it is a dedicated cpu for AF
I guess Canon knows best.

I'll bet every camera has a processor dedicated to AF, how else is it going to achieve AF? The 1DIV didn't have a DIGIC processor dedicated to it, or metering, either. Since the 1DX uses its metering to assist in AF, and the DIGIC4 is dedicated to metering, it could be said to assist in AF, which the 5D mkIII is lacking.
However, the site has this to say:

"Also increasing the focus accuracy, the EOS 5D Mark III uses a dedicated light source detection sensor within the AF unit to enable it to differentiate between different light sources and their spectral characteristics. Because different wavelengths of light will focus a slightly different distances, the light source detection sensor allows the AF to automatically compensate for these light sources and so provide higher precision and increased focus consistency"
--
Skip M
http://www.shadowcatcherimagery.com
http://www.pbase.com/skipm
http://skipm.smugmug.com/
http://skipmiddletonglamourshooter.blogspot.com/
'Living in the heart of a dream, in the Promised Land!'
John Stewart

altenae Regular Member • Posts: 377
Re: To put it another way - re 5DIII AF

I'll bet every camera has a processor dedicated to AF, how else is it going to achieve > AF? The 1DIV didn't have a DIGIC processor dedicated to it, or metering, either. S> ince the 1DX uses its metering to assist in AF, and the DIGIC4 is dedicated to > metering, it could be said to assist in AF, which the 5D mkIII is lacking.

Well there must be some difference between the AF of the 5d Mark III and the 1Dx

However on paper the 5d mark III can be the same or better as the 1D Mark IV (already 2.5 years old)

BUT.....time will tell.

VivaLasVegas Senior Member • Posts: 1,210
Re: To put it another way - re 5DIII AF

Dr. Leonard wrote:

Do the specs on the 5DIII AF indicate an ability for action shots as good as the 7D > .(or MkIV)? Or do we just have to wait for testing?

At the end of the day/night, 5D3's AF will reign supreme over 7D and 1D4.

Shutter Lag Comparisons:
5D3(.059 sec.) VS 1D4(.049 sec.) VS 7D(.061 sec.)

AF CPU Comparisons:
5D3(1 Digic +5, 17x faster than Digic 4) VS 1D4(2 Digic 4) VS 7D(2 Digic 4)

AF Pts. Comparisons:
5D3(61 AF pts.41 x-type) VS 1D4(45 AF pts.39 x-type) VS 7D(19 AF pts.19 x-ype)

Dimmest AF Working Range Comparisons:
5D3(-2EV) VS 1D4(-1EV) VS 7D(-.5EV)

Metering Comparisons:
5D3(63-zone iFCL, 2nd gen.) VS 1D4(63-zone TTL) VS 7D(63-zone iFCL, 1st gen.)

Kevin Coppalotti Veteran Member • Posts: 9,234
Write speed?

The AF looks good on paper but for an event/sports shooter the write speed counts. The 5DMKIII can take 18 RAW shots to fill the buffer, but how quickly can it clear the buffer?
--
Kevin Coppalotti
http://maxhr.zenfolio.com/

vincent__l Regular Member • Posts: 336
Re: To put it another way - re 5DIII AF

double post

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