Sample of 10D focus problem

[Lou29874]

Here are 2 10D photos that show exactly what the problem my 10D has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about 10 feet away. The only difference was in HOW I focused. (Lens : Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew that when I shot at the lenses widest (24mm), I knew the AF (center spot) would give me a bad reading and not focus properly. Though I also knew that If I shot the image at 70mm (fully zoomed) it would be pretty sharp. So I determined the problem was shooting in wide angles.

In this example when fully zoomed at 70mm the lens registered a distance to subject of just about 10 feet. When AF'ing while at 24mm, the distance registered was much higher almost hitting infinity. Result: a soft image.

PHOTO 1

Here is a shot of the soft image. Taken stright with the center AF spot with the lens at 24mm. Very soft. The center spot was fully on the magazine and there was nothing to fool it. This was done 10 times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2

Here is the same shot EXCEPT that I first focus at 70mm then held the shutter half way and backed the lens up to 24mm. Much sharper BUT not acceptable, in the real world I will not have time to do this for all my shots at an event. The camera should focus properly at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

 

[Joe-TN]

These appear from the annotation to be E-10 photos. Why don't you show yours? Then perhaps someone can help you figure out where the problem is.

Joe

Here are 2 10D photos that show exactly what the problem my 10D
has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about
10 feet away. The only difference was in HOW I focused. (Lens :
Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew
that when I shot at the lenses widest (24mm), I knew the AF (center
spot) would give me a bad reading and not focus properly. Though I
also knew that If I shot the image at 70mm (fully zoomed) it would
be pretty sharp. So I determined the problem was shooting in wide
angles.

In this example when fully zoomed at 70mm the lens registered a
distance to subject of just about 10 feet. When AF'ing while at
24mm, the distance registered was much higher almost hitting
infinity. Result: a soft image.

PHOTO 1
Here is a shot of the soft image. Taken stright with the center AF
spot with the lens at 24mm. Very soft. The center spot was fully on
the magazine and there was nothing to fool it. This was done 10
times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2
Here is the same shot EXCEPT that I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm. Much sharper
BUT not acceptable, in the real world I will not have time to do
this for all my shots at an event. The camera should focus properly
at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

--
Joe-TN

http://www.pbase.com/joe_tn/shared_photos

 

[Lou29874]

These ARE my 10D photos, ignore the annotation.
see the images dside by side here:

See both side by side here:
http://www.photo.net/photodb/photo?photo_id=1460805&size=lg

Joe

Here are 2 10D photos that show exactly what the problem my 10D
has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about
10 feet away. The only difference was in HOW I focused. (Lens :
Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew
that when I shot at the lenses widest (24mm), I knew the AF (center
spot) would give me a bad reading and not focus properly. Though I
also knew that If I shot the image at 70mm (fully zoomed) it would
be pretty sharp. So I determined the problem was shooting in wide
angles.

In this example when fully zoomed at 70mm the lens registered a
distance to subject of just about 10 feet. When AF'ing while at
24mm, the distance registered was much higher almost hitting
infinity. Result: a soft image.

PHOTO 1
Here is a shot of the soft image. Taken stright with the center AF
spot with the lens at 24mm. Very soft. The center spot was fully on
the magazine and there was nothing to fool it. This was done 10
times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2
Here is the same shot EXCEPT that I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm. Much sharper
BUT not acceptable, in the real world I will not have time to do
this for all my shots at an event. The camera should focus properly
at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

--
Joe-TN

http://www.pbase.com/joe_tn/shared_photos

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

 

[Stefan Schott]

I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm.

You can't do that with a 24-70 L. The focus will drift as you zoom.

Apart from that, the first photo in particular is scandalously o.o.f. - did you use a tripod? What was the exposure time?

Regards
Stefan

 

[Mashty138655]

I never had any luck zooming in to focus then zooming out and expecting the focus to still be on.

Mashty

 

[Joseph D'Agostino]

I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm.

You can't do that with a 24-70 L. The focus will drift as you zoom.

Apart from that, the first photo in particular is scandalously
o.o.f. - did you use a tripod? What was the exposure time?

Regards
Stefan

The red square does not indicate focus lock , the green led does .

 

[Richie Lee]

The first picture is so out of focus, that I can't believe it was taken with the 24-70L. I certainly haven't had this experience with any of my lenses and my 10D. Have you contacted Canon about this? Your situation is certainly not the norm.
Richie Lee

 

[davidhood]

what you're refering to. I also use a 24-70 L and always zoom up to focus. I wouldn't get decent results otherwise. The focus on the 10D (and the D60 before it) is really weak. However the 24-70 makes it possible to zoom up to focus (parafocal I think it's called).

Here are 2 10D photos that show exactly what the problem my 10D
has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about
10 feet away. The only difference was in HOW I focused. (Lens :
Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew
that when I shot at the lenses widest (24mm), I knew the AF (center
spot) would give me a bad reading and not focus properly. Though I
also knew that If I shot the image at 70mm (fully zoomed) it would
be pretty sharp. So I determined the problem was shooting in wide
angles.

In this example when fully zoomed at 70mm the lens registered a
distance to subject of just about 10 feet. When AF'ing while at
24mm, the distance registered was much higher almost hitting
infinity. Result: a soft image.

PHOTO 1
Here is a shot of the soft image. Taken stright with the center AF
spot with the lens at 24mm. Very soft. The center spot was fully on
the magazine and there was nothing to fool it. This was done 10
times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2
Here is the same shot EXCEPT that I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm. Much sharper
BUT not acceptable, in the real world I will not have time to do
this for all my shots at an event. The camera should focus properly
at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

 

[Lou29874]

Understood, but still when I did that the focus was sharper than if I shot it straight at 24mm.

I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm.

You can't do that with a 24-70 L. The focus will drift as you zoom.

Apart from that, the first photo in particular is scandalously
o.o.f. - did you use a tripod? What was the exposure time?

Regards
Stefan

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

 

[Lou29874]

I live in NJ so I will be personally dropping off the camera (and lens) at Canon.

 

[Lou29874]

David, but thats not the norm I hope? I cant imagine doing that during an even where I shoot 500 Images.

Here are 2 10D photos that show exactly what the problem my 10D
has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about
10 feet away. The only difference was in HOW I focused. (Lens :
Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew
that when I shot at the lenses widest (24mm), I knew the AF (center
spot) would give me a bad reading and not focus properly. Though I
also knew that If I shot the image at 70mm (fully zoomed) it would
be pretty sharp. So I determined the problem was shooting in wide
angles.

In this example when fully zoomed at 70mm the lens registered a
distance to subject of just about 10 feet. When AF'ing while at
24mm, the distance registered was much higher almost hitting
infinity. Result: a soft image.

PHOTO 1
Here is a shot of the soft image. Taken stright with the center AF
spot with the lens at 24mm. Very soft. The center spot was fully on
the magazine and there was nothing to fool it. This was done 10
times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2
Here is the same shot EXCEPT that I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm. Much sharper
BUT not acceptable, in the real world I will not have time to do
this for all my shots at an event. The camera should focus properly
at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

 

[davidhood]

have evenings where I do 500 shots. As this is just a hobby for me.

As far as being the norm, it is for me. It was that way on my D60 and it's that way on my 10D.

If I don't do it that way, I'll get get a high percentage of OOF shots. If I zoom up my percentage of good shots increases dramatically.

I wish I had a 1D to test. Although I don't like the form factor of the 1D, I could live with it if I could get rid of the lousy focus on the prosumer DSLR cameras.

Here are 2 10D photos that show exactly what the problem my 10D
has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about
10 feet away. The only difference was in HOW I focused. (Lens :
Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew
that when I shot at the lenses widest (24mm), I knew the AF (center
spot) would give me a bad reading and not focus properly. Though I
also knew that If I shot the image at 70mm (fully zoomed) it would
be pretty sharp. So I determined the problem was shooting in wide
angles.

In this example when fully zoomed at 70mm the lens registered a
distance to subject of just about 10 feet. When AF'ing while at
24mm, the distance registered was much higher almost hitting
infinity. Result: a soft image.

PHOTO 1
Here is a shot of the soft image. Taken stright with the center AF
spot with the lens at 24mm. Very soft. The center spot was fully on
the magazine and there was nothing to fool it. This was done 10
times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2
Here is the same shot EXCEPT that I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm. Much sharper
BUT not acceptable, in the real world I will not have time to do
this for all my shots at an event. The camera should focus properly
at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

 

[davidhood]

I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm.

You can't do that with a 24-70 L. The focus will drift as you zoom.

Apart from that, the first photo in particular is scandalously
o.o.f. - did you use a tripod? What was the exposure time?

Regards
Stefan

 

[davidhood]

assigned to the " " button I assume?

Here are 2 10D photos that show exactly what the problem my 10D
has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about
10 feet away. The only difference was in HOW I focused. (Lens :
Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew
that when I shot at the lenses widest (24mm), I knew the AF (center
spot) would give me a bad reading and not focus properly. Though I
also knew that If I shot the image at 70mm (fully zoomed) it would
be pretty sharp. So I determined the problem was shooting in wide
angles.

In this example when fully zoomed at 70mm the lens registered a
distance to subject of just about 10 feet. When AF'ing while at
24mm, the distance registered was much higher almost hitting
infinity. Result: a soft image.

PHOTO 1
Here is a shot of the soft image. Taken stright with the center AF
spot with the lens at 24mm. Very soft. The center spot was fully on
the magazine and there was nothing to fool it. This was done 10
times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2
Here is the same shot EXCEPT that I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm. Much sharper
BUT not acceptable, in the real world I will not have time to do
this for all my shots at an event. The camera should focus properly
at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

 

[davidhood]

...know if you find out anything on this.

I think it's a common problem, but most people assume it's motion blur related.

I live in NJ so I will be personally dropping off the camera (and
lens) at Canon.

 

[The Raven]

Why does the annotation show the camera to be an E-10? What are the exposure values? Did you normally zoom in on your E-10 to focus and then zoom out to shoot? Is that what you normally do on the 10D? Which FOCUS mode are you using... ONE SHOT? AI FOCUS? AI SERVO? Did you lock the focus point on the center point and disable the others? Have you tried to CLEAR CAMERA SETTINGS and CLEAR CUSTOM SETTINGS from the camera menu?

Thanks.

 

[davidhood]

about the 24-70 is that you CAN zoom up to focus. From what I've been told, most of the zooms will not allow you to do that, as the focus will shift when you zoom wide again. I know the 28-135 wouldn't allow that, that's one of the reasons I sold mine.

 

[Lou29874]

Ignore the annotation. The e10 is my original camera and I dont have the 10D registered in that websites database.

All shots were 10d. One shot (its a still object), 1/60th f5.6 100ASA, what you see is a crop of a larger image.

Zooming in and then back was only done to SHOW that the focus SHOULD be much better than it is when shooting straight at 24mm. There mere fact that I get better focus by zooming in and back than shooting straight shows a problem.

I shot weddings for 2 years very sucessfully with my e10...good thing I didnt sell it. But lets see what Canon says when I show up at their doorstep tomorrow. I need this resolved ASAP as I have weddings lined up right around the corner.

Why does the annotation show the camera to be an E-10? What are the
exposure values? Did you normally zoom in on your E-10 to focus and
then zoom out to shoot? Is that what you normally do on the 10D?
Which FOCUS mode are you using... ONE SHOT? AI FOCUS? AI SERVO? Did
you lock the focus point on the center point and disable the
others? Have you tried to CLEAR CAMERA SETTINGS and CLEAR CUSTOM
SETTINGS from the camera menu?

Thanks.

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

 

[Lou29874]

David, actually I dont. What the advantage?

Here are 2 10D photos that show exactly what the problem my 10D
has. I would like to verify if any others experienced the same.

Both were shot from the same distance at the same settings at about
10 feet away. The only difference was in HOW I focused. (Lens :
Canon 24-70mm L)

Knowing the problem my 10D had from testing it many times, I knew
that when I shot at the lenses widest (24mm), I knew the AF (center
spot) would give me a bad reading and not focus properly. Though I
also knew that If I shot the image at 70mm (fully zoomed) it would
be pretty sharp. So I determined the problem was shooting in wide
angles.

In this example when fully zoomed at 70mm the lens registered a
distance to subject of just about 10 feet. When AF'ing while at
24mm, the distance registered was much higher almost hitting
infinity. Result: a soft image.

PHOTO 1
Here is a shot of the soft image. Taken stright with the center AF
spot with the lens at 24mm. Very soft. The center spot was fully on
the magazine and there was nothing to fool it. This was done 10
times with the same result.

http://www.photo.net/photodb/photo?photo_id=1460766&size=lg

PHOTO 2
Here is the same shot EXCEPT that I first focus at 70mm then held
the shutter half way and backed the lens up to 24mm. Much sharper
BUT not acceptable, in the real world I will not have time to do
this for all my shots at an event. The camera should focus properly
at both ranges.

http://www.photo.net/photodb/photo?photo_id=1460734&size=lg

Both images are a 100% crop of a much wider photo.

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez

 

[davidhood]

don't shoot at f2.8. The narrow DOF obviously hightlights the problem. I suspect the reason we don't hear much about this is that most people are not shooting f2.8, they're up in the f6-f10 range where the deeper DOF masks the problem (that's just a theory though).

All shots were 10d. One shot (its a still object), 1/60th f5.6
100ASA, what you see is a crop of a larger image.
Zooming in and then back was only done to SHOW that the focus
SHOULD be much better than it is when shooting straight at 24mm.
There mere fact that I get better focus by zooming in and back than
shooting straight shows a problem.

I shot weddings for 2 years very sucessfully with my e10...good
thing I didnt sell it. But lets see what Canon says when I show up
at their doorstep tomorrow. I need this resolved ASAP as I have
weddings lined up right around the corner.

Why does the annotation show the camera to be an E-10? What are the
exposure values? Did you normally zoom in on your E-10 to focus and
then zoom out to shoot? Is that what you normally do on the 10D?
Which FOCUS mode are you using... ONE SHOT? AI FOCUS? AI SERVO? Did
you lock the focus point on the center point and disable the
others? Have you tried to CLEAR CAMERA SETTINGS and CLEAR CUSTOM
SETTINGS from the camera menu?

Thanks.

--
LS
http://www.SchroderPhotography.com/sdat.html
Schroder's Digital Album Templates

http://http://nj.topweddingsites.com/rank/rankem.cgi?id=ritez