5D3 - 1DX focus speed

colintf wrote in post #16182956
I have one in the classifieds

I can't do anything until the end of September unfortunately!

N2bnfunn wrote in post #16182979
oh yeah the 1DX processor is much faster...

they are the same processor only this different is the 1DX has 2 of them

chris61 wrote in post #16183252
they are the same processor only this different is the 1DX has 2 of them

The 1DX has a DIGIC 4 dedicated to focus and metering control (which the 5D3 doesn't) in addition to the dual DIGIC 5 processors.

frankchn wrote in post #16183745
The 1DX has a DIGIC 4 dedicated to focus and metering control (which the 5D3 doesn't) in addition to the dual DIGIC 5 processors.

Wow. I didn't know that.

jdizzle wrote in post #16180615
The 1DX no doubt. A 1D series body has no compromises.

Except for dynamic range, small output files, low ISO noise, etc... Yadda x 3.:p

Todd Lambert wrote in post #16183881
Except for dynamic range, small output files, low ISO noise, etc... Yadda x 3.:p

Hehe! It's still a great camera regardless.

2slo wrote in post #16182291
Chris,

I use my 500 f/4 with 1D IV, 5D3 and 1Dx. The two newer bodies are very good in AF speed (the 1Dx has a slight edge on the 5D3) with the 1D IV not far behind.
In low light situations the newer bodies do better still.
Don't be put off using the 1D IV though, it's still a really good choice.

2slo, your post is helpful to me. I've been very tempted to pair a 1DX with my 500mm f/4l, but your post is an encouragement: the 5D3 is not a slouch by comparison. Though I very much like the exceptional ISO performance of the 1DX as evidenced in your recent shots, I think I'll stick it out with the 5D3 and see what Canon comes up with for a sequel to the 7D.

frankchn wrote in post #16183745
The 1DX has a DIGIC 4 dedicated to focus and metering control (which the 5D3 doesn't) in addition to the dual DIGIC 5 processors.

just had a look on canon's site nothing in the spec on there. but then looked ad wex camera site and they have it as you posted 1 digic 4 and 2 digic 5 so well spotted i never new it had 3 processes

nellyle wrote in post #16183001
I can't do anything until the end of September unfortunately!

no problem

The 1DX doesn't have three processors. Canon specifies dual Digic 5+ processors mainly for image processing, AF in live view, card and rear display drive.
Then it has a dedicated AF processor, just like the 7D and the 1D Mark IV (to mention a few). I haven't checked now, but I think the 5D Mark III has the same. Somebody here will know for sure.

In addition to this, the 1DX only also has a Digic 4 processor dedicated to driving the 100000 pixel light metering sensor. The 5D Mark III doesn't have such a light meter, thus no such dedicated processor either.

Then these cameras have a processor designed to handle the normal sequence control of the camera, i.e. sensing buttons and dials, displaying info on the top display and in the viewfinder, computing exposure with data from the exposure metering and so on.

So from data available regarding the CPU configuration of the 1DX, and some extrapolation from previous models, the 1DX has at least five processors. How the Gigabit Ethernet is handled I don't know. Whether something which could be classified as an independent processor is involved there too, I've not seen any information about.

apersson850 wrote in post #16185135
The 1DX doesn't have three processors. Canon specifies dual Digic 5+ processors mainly for image processing, AF in live view, card and rear display drive.
Then it has a dedicated AF processor, just like the 7D and the 1D Mark IV (to mention a few). I haven't checked now, but I think the 5D Mark III has the same. Somebody here will know for sure.

In addition to this, the 1DX only also has a Digic 4 processor dedicated to driving the 100000 pixel light metering sensor. The 5D Mark III doesn't have such a light meter, thus no such dedicated processor either.

Then these cameras have a processor designed to handle the normal sequence control of the camera, i.e. sensing buttons and dials, displaying info on the top display and in the viewfinder, computing exposure with data from the exposure metering and so on.

So from data available regarding the CPU configuration of the 1DX, and some extrapolation from previous models, the 1DX has at least five processors. How the Gigabit Ethernet is handled I don't know. Whether something which could be classified as an independent processor is involved there too, I've not seen any information about.

So, you stated that the 1Dx doesn't have three processors. Let's count the processors from your post.....

2 - DIGIC 5+ procesoors
1 - DIGIC 4 processor

I think 2 + 1 = 3.

This link from TDP also states that the 1Dx has three processors in the "Key Specifications" part of the review.

http://www.the-digital-picture.com …al-SLR-Camera-Review.aspx

So why do you think there are only two?

BTW, the 5D III has only one DIGIC 5+ processor.

nellyle wrote in post #16182259
Hmmm, thanks for all the replies. I'm starting to think that finding a good used 1D4 and keeping my 1DS2 is the best option. I used to have a 1D2N, a 1D4 will be a fair way more up to date I'm guessing.

Don't worry, a 5D3 in full working order locks on and tracks far better than a 7D, and a bit better than a 1Dmk4. I borrowed a 500ii from CPS back in February and used it with my 5D3. No complaints; it was fast and accurate, even with a 1.4 x ii extender.

Obviously the 1DX AF reigns supreme, but the 5D3 is in the same ballpark. Fact

Haven't used 1dx. Higher fps is very nice for catching the right moment but besides that if you can't get the shot with 5dmk3, 1dx is not going to help much IMHO.

notastockpikr wrote in post #16185417
So, you stated that the 1Dx doesn't have three processors. Let's count the processors from your post.....

2 - DIGIC 5+ procesoors
1 - DIGIC 4 processor

I think 2 + 1 = 3.

This link from TDP also states that the 1Dx has three processors in the "Key Specifications" part of the review.

http://www.the-digital-picture.com …al-SLR-Camera-Review.aspx

So why do you think there are only two?

BTW, the 5D III has only one DIGIC 5+ processor.

Didn't read his post did you?
He states 5 processors minimum, not 2.

Me, i have no idea

here is a quote from wex website

The Canon EOS 1D X Digital SLR is the next generation of Canon's professional range, offering a combination of speed, resolution and outstanding image quality. The 1D X presents an 18.1MP full-frame CMOS sensor, a redesigned autofocus (AF) system and powerful new metering technology with 3 DIGIC processors, including 2 DIGIC 5+ image processors and a dedicated DIGIC 4 for metering and AF control to ensure correct exposure levels and improved AF tracking. The dual processors enable full-resolution continuous shooting of up to 12 frames per second (RAW) plus 14 frames per second in High Speed mode (18MP JPEG). The 1D X is equipped with an incredible 61-point wide-area autofocus system with 41 sensitive cross-type sensors, including five dual cross type points, to ensure unsurpassed accuracy and higher levels of speed. The standard ISO range of the 1D X is 100-51,200, expandable up to an impressive 204,800