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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 02 Jun 2009 (Tuesday) 13:47
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Best AF System - 40D v 50D v 5D v 5DII

 
psxindo
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Jun 02, 2009 13:47 |  #1

I currently have 30D and thinking of upgrading.
right now AF system is on my priority list
which of these would have better AF system
40D, 50D, 5DI, or 5DII

I know 1D is the best, but I'm there yet financially.

Thanks


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CyberDyneSystems
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Jun 02, 2009 13:49 |  #2

Isn't the 5D II in a similar price range as a 1D MkIII?

Anyway,. of the cameras you list, they are all about the same, very little difference at all.

If you really are upgrading from a 30D for the AF, none of these will be much different... they will all be only slightly better.
For less money than some listed, a used 1D MkII would be the real jump in better AF,.


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psxindo
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Jun 02, 2009 13:57 |  #3

Well, you might be right on the 1DII... i'll look into it... This might be the best option... Thanks... Now, why didn't I think about this...

What I'm thinking is because the 40D have 9 cross type while the 5DII only 1 cross type AF points.


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TaDa
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Jun 02, 2009 14:04 |  #4

Like CDS said, none will compete with the AF of a 1 series


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matonanjin
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Jun 02, 2009 14:14 |  #5

As has been stated, a 1D MKn is going to be faster AF. Think about a used 1DMKIIn.

Of the ones you have listed the 40D/50D's have faster AF than the 5D's. I use my 5D for almost everything, except when I get to fast moving sports then the 40D comes out.


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toxic
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Jun 02, 2009 14:36 |  #6

Among those, the 40/50D have cross-type sensors at all focus points. The 5D(II), meanwhile, has a similar AF system to the 30D, with a cross-type only in the center, but it has 6 available "helper" points around the center in AI Servo. Both systems work, but both don't compare to 1-series AF.




  
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Tom ­ W
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Jun 02, 2009 14:40 |  #7

Depends....

I've had the 40D and have both the 5D and 5D2. I can't tell any difference between the two 5's, though I haven't compared them in all situations yet.

My 5D actually gives me a higher "keeper" rate than the 40D when shooting AI Servo (tracking moving vehicles) using the center AF point, probably because of the expansion AF points on the 5D which essentially make the entire spot metering circle an AF 'zone'. I won't mention my tracking experience with the 1D3 since I had one of the early ones with AF problems.

However, the peripheral AF points on the 40D perform better under low light than those on the 5D. They're more accurate (cross-type sensors) and quicker to gain focus in darker conditions.

I'm with CDS - the 1D II is superior to both in many ways. The only situations where my 5D would outperform (slightly) the 1D2 is in low-light sensitivity - the 5D will focus in slightly darker situations than the old 1D2. The 1D3 is another story - it will AF in situations around 1/2 stop darker than the 5D and will do so more quickly.


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CyberDyneSystems
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Jun 02, 2009 14:49 |  #8

.. when it works... :lol:


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jacobsen1
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Jun 02, 2009 14:55 as a reply to  @ CyberDyneSystems's post |  #9

I've owned a 5D, 5Dii and 40D (which I'll assume is the same as the 50D).

The 5Dii wins in terms of accuracy. It also wins in terms of center point speed. It beats or equals the AF of the 5D in every way.

the 40D's outer points are cross types. So when you have the right amount of light that cross types save it, then it's better than a 5Dii. it's center point is good, but not as good/accurate as the 5Dii.

I came to the 5 series from a 1Dii and I can say my keep ration has gone through the roof. You shoot less images because you look for "the one" not a sequence, plus the AF is more accurate, even over a 1 series. Basically, as long as you're not getting screwed by the lack of outer cross points the 5Dii is the best AF I've used.


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bohdank
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Jun 02, 2009 15:36 |  #10

I have found the center AF point on my 5D works better than on my 40D, also.

So much so, I sent my 40D in, last week, because I thoughtt "that can't be right" :-)


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Agamemnon
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Jun 02, 2009 15:57 as a reply to  @ bohdank's post |  #11

I've used the 20D / 50D / 1D Mark II N / 5D, and I subjectively found them to be this order

5D / 20D - It's a wash, the 5D has the assist points in the middle that are better for servo tracking, but the 20D was no slouch in general.

50D - Outer points better in low-light than the 5D, MUCH better. Middle point is roughly the same, if not a little better. Seems to be more responsive than 5D

1D Mark II N - More cross-sensitive points than the others, and has a dedicated processor for focusing. Also, for birding, my main purpose, the blob of points is much better for not losing the subject between the points. Noticeably faster than the 50D, as I recall.

I "cross-graded" to the 50D, as I didn't feel I needed all of the features of the 1D, yet now I miss that blob of AF points.

My pick for the "best" AF would be the 50D, assuming you're just talking about general work, and not something like birding.

Birding -> 1D Mark II / 1D Mark II N. KEH has some Mark IIs for under $1000 USD.


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Best AF System - 40D v 50D v 5D v 5DII
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