| Author |
Message |
Jim Garrison
Guest
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 Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Canon EOS 20D Autofocus - Serious Problem? |
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I spent ~$2000 on an EOS 20D and 17-85 IS USM lens in June of this
year. So far it's been back to the factory for repair twice.
The first time was for flash exposure problems, which were fixed,
and severe back-focus, which was not fixed. I sent it back in and
it came back with the same problem. Canon's stock answer is "send
it in for repair". Well, I've done that twice without the problem
being corrected.
I've read in various forums that this particular lens is somewhat
'soft', but my experiments show that I can get more sharpness
focusing manually than the camera will produce on autofocus.
Yes, the lens is a little soft, but not as soft as you might
think from autofocus shots, at least on my camera.
I've posted test samples at http://www.jhmg.net/misc/canon/ that
were made using a focusing test chart. The central focus point was
selected and placed on the black bar in the middle of the image, so
that the top edge of the black bar ran through the middle of the
focus point. The camera was on a sturdy tripod, the angle
between the plane of the chart and the camera lens axis was 45
degrees and the camera distance was about 36". A cable release was
used to eliminate the possibility of camera shake.
I'd like to hear from others that have the same problem, or
conversely, if this kind of performance is the best the technology
can do today I need to know also, even though that would be
disappointing.
If the consensus is that the lens is defective, does anyone know how
to get past Canon's first-level support drones and escalate this to
someone who can do something about it?
--
Jim Garrison (jhg@acm.org)
PGP Keys at http://www.jhmg.net RSA 0x04B73B7F DH 0x70738D88
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Herb Ludwig
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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"Jim Garrison" <jhg@acm.org> wrote >I spent ~$2000 on an EOS 20D and 17-85
IS USM lens in June of this
| Quote: | year. I've read in various forums that this particular lens is somewhat
'soft', but my experiments show that I can get more sharpness
focusing manually than the camera will produce on autofocus.
Yes, the lens is a little soft, but not as soft as you might
think from autofocus shots, at least on my camera.
|
AFAIK the EOS20D has an autofocus that functions differently with lenses
above 2.8 max aperture and stops more or less functioning with lenses max
5.6 or above. |
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William Oertell
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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"Jim Garrison" <jhg@acm.org> wrote in message
news:o6Rdf.13945$th3.854@tornado.texas.rr.com...
| Quote: | I spent ~$2000 on an EOS 20D and 17-85 IS USM lens in June of this
year. So far it's been back to the factory for repair twice.
The first time was for flash exposure problems, which were fixed,
and severe back-focus, which was not fixed. I sent it back in and
it came back with the same problem. Canon's stock answer is "send
it in for repair". Well, I've done that twice without the problem
being corrected.
I've read in various forums that this particular lens is somewhat
'soft', but my experiments show that I can get more sharpness
focusing manually than the camera will produce on autofocus.
Yes, the lens is a little soft, but not as soft as you might
think from autofocus shots, at least on my camera.
I've posted test samples at http://www.jhmg.net/misc/canon/ that
were made using a focusing test chart. The central focus point was
selected and placed on the black bar in the middle of the image, so
that the top edge of the black bar ran through the middle of the
focus point. The camera was on a sturdy tripod, the angle
between the plane of the chart and the camera lens axis was 45
degrees and the camera distance was about 36". A cable release was
used to eliminate the possibility of camera shake.
I'd like to hear from others that have the same problem, or
conversely, if this kind of performance is the best the technology
can do today I need to know also, even though that would be
disappointing.
If the consensus is that the lens is defective, does anyone know how
to get past Canon's first-level support drones and escalate this to
someone who can do something about it?
--
Jim Garrison (jhg@acm.org)
PGP Keys at http://www.jhmg.net RSA 0x04B73B7F DH 0x70738D88
|
Try turning off all the other autofocus points except the one in the
middle. I had the same problem. Sometimes the center autofocus spot would
be on what I wanted, but one of the other ones would be on something a
little further. Using only the center spot gives me perfect
autofocus...well at least better than I can do with my eyes. |
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Joseph Meehan
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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Jim Garrison wrote:
| Quote: | I spent ~$2000 on an EOS 20D and 17-85 IS USM lens in June of this
year. So far it's been back to the factory for repair twice.
|
Ignore the trolls.
I have one and I have not had any problems with it. The lens seems to
auto-focus just fine.
| Quote: |
The first time was for flash exposure problems, which were fixed,
and severe back-focus, which was not fixed. I sent it back in and
it came back with the same problem. Canon's stock answer is "send
it in for repair". Well, I've done that twice without the problem
being corrected.
I've read in various forums that this particular lens is somewhat
'soft', but my experiments show that I can get more sharpness
focusing manually than the camera will produce on autofocus.
Yes, the lens is a little soft, but not as soft as you might
think from autofocus shots, at least on my camera.
I've posted test samples at http://www.jhmg.net/misc/canon/ that
were made using a focusing test chart. The central focus point was
selected and placed on the black bar in the middle of the image, so
that the top edge of the black bar ran through the middle of the
focus point. The camera was on a sturdy tripod, the angle
between the plane of the chart and the camera lens axis was 45
degrees and the camera distance was about 36". A cable release was
used to eliminate the possibility of camera shake.
I'd like to hear from others that have the same problem, or
conversely, if this kind of performance is the best the technology
can do today I need to know also, even though that would be
disappointing.
If the consensus is that the lens is defective, does anyone know how
to get past Canon's first-level support drones and escalate this to
someone who can do something about it?
|
--
Joseph Meehan
Dia duit |
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Backbone
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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| Quote: | Do you have to hire someone to keep you breathing? Are you really so
fucking stupid that you believe all this digital-autofocus-zoom lens
crap?
PLONK!!! |
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Backbone
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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I have had similar issues - I found that using additional light initially
solves the problem - what I mean is that the subject perhaps needs to be lit
up before focusing for the shot!--
There are no words that can be heard unless someone listens....
Remove *flaps* to reply
"Jim Garrison" <jhg@acm.org> wrote in message
news:o6Rdf.13945$th3.854@tornado.texas.rr.com...
| Quote: | I spent ~$2000 on an EOS 20D and 17-85 IS USM lens in June of this
year. So far it's been back to the factory for repair twice.
The first time was for flash exposure problems, which were fixed,
and severe back-focus, which was not fixed. I sent it back in and
it came back with the same problem. Canon's stock answer is "send
it in for repair". Well, I've done that twice without the problem
being corrected.
I've read in various forums that this particular lens is somewhat
'soft', but my experiments show that I can get more sharpness
focusing manually than the camera will produce on autofocus.
Yes, the lens is a little soft, but not as soft as you might
think from autofocus shots, at least on my camera.
I've posted test samples at http://www.jhmg.net/misc/canon/ that
were made using a focusing test chart. The central focus point was
selected and placed on the black bar in the middle of the image, so
that the top edge of the black bar ran through the middle of the
focus point. The camera was on a sturdy tripod, the angle
between the plane of the chart and the camera lens axis was 45
degrees and the camera distance was about 36". A cable release was
used to eliminate the possibility of camera shake.
I'd like to hear from others that have the same problem, or
conversely, if this kind of performance is the best the technology
can do today I need to know also, even though that would be
disappointing.
If the consensus is that the lens is defective, does anyone know how
to get past Canon's first-level support drones and escalate this to
someone who can do something about it?
--
Jim Garrison (jhg@acm.org)
PGP Keys at http://www.jhmg.net RSA 0x04B73B7F DH 0x70738D88 |
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Skip M
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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"Backbone" <backboneaccessflaps@flapscomcast.net> wrote in message
news:E9SdnfBcm-DScerenZ2dnUVZ_tCdnZ2d@giganews.com...
| Quote: | Do you have to hire someone to keep you breathing? Are you really so
fucking stupid that you believe all this digital-autofocus-zoom lens
crap?
PLONK!!!
He changed his nic so as to escape the kill files of all the people who are |
sick of his monomaniacal rantings. He's an idiot who has never taken a
decent image in his life, even given the best of equipment. Or at least he
claims to have the best of equipment.
--
Skip Middleton
http://www.shadowcatcherimagery.com |
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UC
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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Jim Garrison wrote:
| Quote: | I spent ~$2000 on an EOS 20D and 17-85 IS USM lens in June of this
year. So far it's been back to the factory for repair twice.
|
No sympathy from me. Buy a Leica and use film, moron
| Quote: |
The first time was for flash exposure problems, which were fixed,
and severe back-focus, which was not fixed. I sent it back in and
it came back with the same problem. Canon's stock answer is "send
it in for repair". Well, I've done that twice without the problem
being corrected.
|
Ha ha ha ha ha ha ha ha ha ha ha ha
Autofocus? Who needs ithat?
| Quote: |
I've read in various forums that this particular lens is somewhat
'soft', but my experiments show that I can get more sharpness
focusing manually than the camera will produce on autofocus.
|
No shit, Sherlock.
| Quote: | Yes, the lens is a little soft, but not as soft as you might
think from autofocus shots, at least on my camera.
|
Japanese zoom crap.
| Quote: |
I've posted test samples at http://www.jhmg.net/misc/canon/ that
were made using a focusing test chart. The central focus point was
selected and placed on the black bar in the middle of the image, so
that the top edge of the black bar ran through the middle of the
focus point. The camera was on a sturdy tripod, the angle
between the plane of the chart and the camera lens axis was 45
degrees and the camera distance was about 36". A cable release was
used to eliminate the possibility of camera shake.
I'd like to hear from others that have the same problem, or
|
No, I don't have the same problem. I use a 30-year old Leicaflex that
continues to work perfectly year after year. I'm not a moron like you
who is too fucking lazy to focus, and too fucking stupid to buy good
equipment (not Jap crap.)
| Quote: | conversely, if this kind of performance is the best the technology
can do today I need to know also, even though that would be
disappointing.
|
Technology is not the answer, fuckhead, quality is.
| Quote: |
If the consensus is that the lens is defective, does anyone know how
to get past Canon's first-level support drones and escalate this to
someone who can do something about it?
|
Ha ha ha ha ha ha ha ha
Dumbass motherfucking moron shithead dweeb consumer asshole...
| Quote: |
--
Jim Garrison (jhg@acm.org)
PGP Keys at http://www.jhmg.net RSA 0x04B73B7F DH 0x70738D88 |
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UC
Guest
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| Posted:
Mon Nov 14, 2005 5:40 am Post subject:
Re: Canon EOS 20D Autofocus - Serious Problem? |
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Do you have to hire someone to keep you breathing? Are you really so
fucking stupid that you believe all this digital-autofocus-zoom lens
crap?
People like you deserve all the shit that life throws at you. I have no
sympathy for utter morons like you. I hope every camera you buy uis a
piece of crap, that your lenses are shit, because that's what cheap
assholes like you deserve.
Complain all you want, Mr Garrison...the problem is YOU and your
stupidity...
Jim Garrison wrote:
| Quote: | I spent ~$2000 on an EOS 20D and 17-85 IS USM lens in June of this
year. So far it's been back to the factory for repair twice.
The first time was for flash exposure problems, which were fixed,
and severe back-focus, which was not fixed. I sent it back in and
it came back with the same problem. Canon's stock answer is "send
it in for repair". Well, I've done that twice without the problem
being corrected.
I've read in various forums that this particular lens is somewhat
'soft', but my experiments show that I can get more sharpness
focusing manually than the camera will produce on autofocus.
Yes, the lens is a little soft, but not as soft as you might
think from autofocus shots, at least on my camera.
I've posted test samples at http://www.jhmg.net/misc/canon/ that
were made using a focusing test chart. The central focus point was
selected and placed on the black bar in the middle of the image, so
that the top edge of the black bar ran through the middle of the
focus point. The camera was on a sturdy tripod, the angle
between the plane of the chart and the camera lens axis was 45
degrees and the camera distance was about 36". A cable release was
used to eliminate the possibility of camera shake.
I'd like to hear from others that have the same problem, or
conversely, if this kind of performance is the best the technology
can do today I need to know also, even though that would be
disappointing.
If the consensus is that the lens is defective, does anyone know how
to get past Canon's first-level support drones and escalate this to
someone who can do something about it?
--
Jim Garrison (jhg@acm.org)
PGP Keys at http://www.jhmg.net RSA 0x04B73B7F DH 0x70738D88 |
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