5D AF sucks---see examples

Started Nov 6, 2008 | Discussions
amobi
amobi Veteran Member • Posts: 3,136
5D AF sucks---see examples

Ludovic Monchat Veteran Member • Posts: 3,217
Be honest

You were trying and shoot the black curtain behind ??

You know what ?? Manual focus next time !!

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Ludo from Paris
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tko Forum Pro • Posts: 12,929
Re: 5D AF sucks---see examples

Well, those are nice photos, congraduations, but it says nothing about the AF. You probably have about four feet of DOF at F4, so critical focus isn't really important (plus w/that photo size you can't really tell if you have critical focus.) You have lots of contrast at the center, and the subjects are dead centered, piece of cake for any dSLR really.

Now, try a upper body shot of gymnast at F1.4 indoors running towards you : ) A few inches of DOF, over 10 times more critical. Things get sticky very quickly. I know, I know, repeat after me, the 5d isn't a sports camera.

Those were taken with 70-200 F4, right ?? So, good photos, but no need to get defensive about the AF. If it's good enough for you that's great.

amobi
OP amobi Veteran Member • Posts: 3,136
Re: 5D AF sucks---see examples

tko wrote:

Well, those are nice photos, congraduations, but it says nothing
about the AF. You probably have about four feet of DOF at F4, so
critical focus isn't really important (plus w/that photo size you
can't really tell if you have critical focus.) You have lots of
contrast at the center, and the subjects are dead centered, piece of
cake for any dSLR really.

Now, try a upper body shot of gymnast at F1.4 indoors running
towards you : ) A few inches of DOF, over 10 times more critical.
Things get sticky very quickly. I know, I know, repeat after me, the
5d isn't a sports camera.

Those were taken with 70-200 F4, right ?? So, good photos, but no
need to get defensive about the AF. If it's good enough for you
that's great.

That's the point. It is good enough for what I do. I took some at f2.8 and nailed it each time.

JLim22 Contributing Member • Posts: 501
all done using center focus? (n/t)
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n/t----------------------------------

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cmoefc Regular Member • Posts: 497
Congrats!

You've proven that the camera can take in focus web resolution shots of center composed high contrast subjects using the center AF point at f/4.

I doubt anyone would question that even the Rebel could do that.

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amobi
OP amobi Veteran Member • Posts: 3,136
Re: Congrats!

cmoefc wrote:

You've proven that the camera can take in focus web resolution shots
of center composed high contrast subjects using the center AF point
at f/4.

I doubt anyone would question that even the Rebel could do that.

Who cares if I use center focus point as long as I get the job done. And I can easily print 16X20 of these shots. I don't see anything different from the site you suggested for low light tips.

CM_laptop Senior Member • Posts: 2,034
Are these in focus?

They're a bit too small; but some apopear a bit out-of-focus; or is it motion blur?

cmoefc Regular Member • Posts: 497
Re: Congrats!

amobi wrote:

Who cares if I use center focus point as long as I get the job done.
And I can easily print 16X20 of these shots. I don't see anything
different from the site you suggested for low light tips.

Honestly, no one should care how you're getting the job done so long as it's done but at the point where anyone posts photos as an example of a camera's capabilities, they have to expect that technique, settings and lenses used will be scrutinized.

All I was saying is that no one questions that the 5D or 5D Mark II are capable of focusing with the combination of lenses, settings and composition in the photos you posted. In fact, I think people would be completely up in arms if your shots proved it couldn't.

What people do question is the ability of the camera to accurately focus at shallow depths of field using the outer AF points.

Where my work differs from the shots you posted is that 80+% of it is shot at f/2.8 or faster with a point of focus off center enough to demand that I rely on a non-center AF point or be forced to focus+recompose to achieve critical focus on the performer's eyes.

And since we know how well focus+recompose works at f1.4 - f/2.8....

Chris

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Richard Ettinger Senior Member • Posts: 1,331
A poor workman blames his tools

Something I learned a long while ago.
--
Canon 40D. Sigma 17-70, Canon 50mm f1.4, canon 135mm 2.8/soft focus, Canon 70-
200 f4L, Canon 24-105L. Ricoh GX-100

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kristian1 Senior Member • Posts: 2,385
i would like to see crops from those two:

if its possible 100% crop from those pictures:

thank you!

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Ken C. Smith Senior Member • Posts: 1,602
Amobi . . .

Great set of images!

It is a shame that some people think that they must go out of their way to down-play the focusing abilities of the 5D on any possible pretext.

You were NOT in a situation where you couldn't use the center focusing point, so you used it. Nothing wrong with that, no reason for criticism. In fact, most people concede that the 5D focuses well with the center point.

The images you took lent themselves to a centered composition -- nothing wrong with that (and you were far enough away that you could have used focus and compose without difficulty if you had wanted). Are there situations where professionals need to use other than the center point in low light? Yes indeed there are -- and for that reason, the 5D is not their camera of choice.

The images you took had lots of contrasty areas where you could focus -- not your frault. Are there situations where professionals need to focus in the absense of high contrast? Yes there are and the 5D might not be their camera of choice for those situations.

That said, there is a whole world of photography that the 5D focus system handles very well. It's as the British would say a " horses for courses " sort of thing.

Is this the most rigorous test of focusing ability? No, it's not -- but it is probably somewhat closer to what the "average" 5D user is likely to run into in general photography than the worst case scenarios that some are want to propose.

Are there situations for which the 5D (and by extension the 5D mkII) would not be the best choice? Oh, yeah! But most professionals who need to operate in those situations don't try to do it with a 5D.

The 5D happens to focus very well in the types of photography that I do ( a lot of low light, high ISO images in dimly lit warehouses, some brochure/catalogue work, and some event photography) so I'm very happy with its focusing ability. But I DO understand that people with other needs will not find the 5D (or 5D mkII) aceptable -- I just wish they'd go out and buy something that DOES meet their needs and quit harping on the issue. The glass can't be half empty ALL of the time. The 5D is what it is and I don't have any problem accepting that.

Best wishes,

Ken

MM1 Senior Member • Posts: 1,504
Re: Congrats!

amobi wrote:

cmoefc wrote:

You've proven that the camera can take in focus web resolution shots
of center composed high contrast subjects using the center AF point
at f/4.

I doubt anyone would question that even the Rebel could do that.

Who cares if I use center focus point as long as I get the job done.

Don't tell us "who cares" when the only who doesn't care as long as you get your job done, is - you Now try those peripheral points at f/1.4-2 at close distances.

And I can easily print 16X20 of these shots. I don't see anything
different from the site you suggested for low light tips.

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Cheers,
Martin

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cityphotographer Senior Member • Posts: 2,510
I guess

that the thread was meant to be sarcastic.. at least that's my wild guess.

in any case the OP wanted to show the pictures more than discuss about the AF (another wild guess) and it's always good when we get to see the pics, even if in this case the credits go to the lighting people more than the photographer.

but I'll follow this thread to understand if the AF of his 5D is good or bad ... who knows..

amobi
OP amobi Veteran Member • Posts: 3,136
Re: Amobi . . .

Ken C. Smith wrote:

Great set of images!

It is a shame that some people think that they must go out of their
way to down-play the focusing abilities of the 5D on any possible
pretext.

You were NOT in a situation where you couldn't use the center
focusing point, so you used it. Nothing wrong with that, no reason
for criticism. In fact, most people concede that the 5D focuses well
with the center point.
The images you took lent themselves to a centered composition --
nothing wrong with that (and you were far enough away that you could
have used focus and compose without difficulty if you had wanted).
Are there situations where professionals need to use other than the
center point in low light? Yes indeed there are -- and for that
reason, the 5D is not their camera of choice.
The images you took had lots of contrasty areas where you could focus
-- not your frault. Are there situations where professionals need to
focus in the absense of high contrast? Yes there are and the 5D might
not be their camera of choice for those situations.

That said, there is a whole world of photography that the 5D focus
system handles very well. It's as the British would say a " horses
for courses " sort of thing.

Is this the most rigorous test of focusing ability? No, it's not --
but it is probably somewhat closer to what the "average" 5D user is
likely to run into in general photography than the worst case
scenarios that some are want to propose.

Are there situations for which the 5D (and by extension the 5D mkII)
would not be the best choice? Oh, yeah! But most professionals who
need to operate in those situations don't try to do it with a 5D.

The 5D happens to focus very well in the types of photography that I
do ( a lot of low light, high ISO images in dimly lit warehouses,
some brochure/catalogue work, and some event photography) so I'm very
happy with its focusing ability. But I DO understand that people with
other needs will not find the 5D (or 5D mkII) aceptable -- I just
wish they'd go out and buy something that DOES meet their needs and
quit harping on the issue. The glass can't be half empty ALL of the
time. The 5D is what it is and I don't have any problem accepting
that.

Best wishes,

Ken

Hi Ken,

You clearly made the point that I was trying to make. For those of you who are wondering I was just being sarcastic. I’m very tired of hearing all these people complaining about AF of 5D. You have to know the limits of 5D and try not to push it. All the pictures I posted were in focus. All the issues I encountered were my fault and not the camera. I used the center focus points because that is the most reliable and I knew this going in. I can always crop to my taste if I don’t want my target to be centered. I did not try to make 5D behave like D3 or IDSmK111 and complain about it later.

Scott Larson Veteran Member • Posts: 6,446
Re: A poor workman blames his tools

Yeah, that's what Canon was telling us Mark III owners. Then they announced the submirror fix. Canon even included a letter of apology with every camera they had to fix.

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Alansworld Senior Member • Posts: 1,310
Re: 5D AF sucks---see examples

tko wrote:

Well, those are nice photos, congraduations,

Congraduations?

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Alan, Newbury, UK

amobi
OP amobi Veteran Member • Posts: 3,136
Re: A poor workman blames his tools

Richard Ettinger wrote:

Something I learned a long while ago.
--
Canon 40D. Sigma 17-70, Canon 50mm f1.4, canon 135mm 2.8/soft focus,
Canon 70-
200 f4L, Canon 24-105L. Ricoh GX-100

In this case I'm very happy with my tools. I think you missed the point.

Richard Ettinger Senior Member • Posts: 1,331
Re: A poor workman blames his tools

Evidently I did.
So, help me out, what was it?
--
Canon 40D. Sigma 17-70, Canon 50mm f1.4, canon 135mm 2.8/soft focus, Canon 70-
200 f4L, Canon 24-105L. Ricoh GX-100

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amobi
OP amobi Veteran Member • Posts: 3,136
Re: A poor workman blames his tools

Richard Ettinger wrote:

Evidently I did.
So, help me out, what was it?
--
Canon 40D. Sigma 17-70, Canon 50mm f1.4, canon 135mm 2.8/soft focus,
Canon 70-
200 f4L, Canon 24-105L. Ricoh GX-100

I don't know what else you want me to explain. I've made it clear that I was being sarcastic. Did you even look at the pictures? Did you notice any of the images being out of focus?

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