AI Servo problem please help!!

Gabriele181256 · Jan 29, 2004

Dear All,

I noticed in many, many photos with a Canon 24-85 USM and 10D, orrible lines in the bottom of the image when I track objects or people or something moving and in very good light. These lines qre very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

John Duesterhoeft · Jan 29, 2004

Gabriele said:
Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Gabriele181256 · Jan 30, 2004

The problem is that I can't undestand how to post an image..
Could you help me?

John Duesterhoeft said:
Gabriele said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Roy van der Woning · Jan 30, 2004

Gabriele181256 said:
The problem is that I can't undestand how to post an image..
Could you help me?

First upload it to a website. Pbase and smugsmug are very popular for this. Then bring up the image you want to post in the forum. Right click on the image, choose properties and copy the image address. Paste that address in your forum message and it will be shown inline.

If you want to post a particularly large image, put a semicolon directly after the image address when you paste it in your message. This will produce a link to your image instead of it being displayed immediately. Modem users will thank you for that.

Roy.

Gabriele181256 · Jan 30, 2004

Thanks Roy
this is the link http://www.pbase.com/image/25598300
Please tell me what you think about
thank you again

Roy van der Woning said:
Roy van der Woning said:

The problem is that I can't undestand how to post an image..
Could you help me?

Click to expand...

First upload it to a website. Pbase and smugsmug are very popular
for this. Then bring up the image you want to post in the forum.
Right click on the image, choose properties and copy the image
address. Paste that address in your forum message and it will be
shown inline.

If you want to post a particularly large image, put a semicolon
directly after the image address when you paste it in your message.
This will produce a link to your image instead of it being
displayed immediately. Modem users will thank you for that.

Roy.

Gabriele181256 · Jan 30, 2004

Thanks,
This is the link http://www.pbase.com/image/25598300
What you think?
Thank you again

John Duesterhoeft said:
Gabriele said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Mikey's_World · Jan 30, 2004

Agreed... This site sucks for postings images. You have to have it posted elswhere in net like pbase.com. Phil, why not use a simple "browse" button??

Mike.
------------------------------------------------

Gabriele said:
John Duesterhoeft said:

Gabriele said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Click to expand...

--
'Get rid of those damn angles! The shortest distance is a straight line.'

Roy van der Woning · Jan 30, 2004

Mikey's_World said:
Agreed... This site sucks for postings images. You have to have
it posted elswhere in net like pbase.com. Phil, why not use a
simple "browse" button??

Because that would mean that the images have to be hosted by dpreview itself. Are you going to pay the storage/backup/bandwidth bills?

Roy.

DoctorG1 · Jan 30, 2004

Gabriele181256 said:
Gabriele181256 said:

Gabriele181256 said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Click to expand...

You talking about the banding thats showing in the red barrier and at the bottom of that pic? I had to adjust the pic quite a lot to see em
Looks like it may be a sensor issue???

Try this , set your lens to f22 or so , take a pic of a blank piece of paper and in PS use AUTO LEVELS to adjust it , this will show any dust on your sensor or if there are "streaks" , you might need a sensor clean.

Have you tried to replicate this with another copy of that same lens? Perhaps the lens is faulty too , especially if you havent noticed it with your 1.8??

For the life of me , I can't really see how it could be a lens problem , but you never know.

--
Rodney Gold

The nicest thing about smacking your head against the the wall is.......The feeling you get when you stop

Alpo Kaponen · Jan 30, 2004

DoctorG1 said:
You talking about the banding thats showing in the red barrier and
at the bottom of that pic? I had to adjust the pic quite a lot to
see em

Looks like your monitor needs calibrating.. I had no problems of seeing them and they are horrible!

I also have 24-85 but I have not yet used AI-focusing so can't say anything about the problem but it's not likely the lens.

--

Mikey's_World · Jan 30, 2004

I was just thinking of that when I re-read my post...

Phil is continuously upgrading his servers, so there's money in it somewhere. Plus, he can continuously set the site to delete messages/photos after they have been on for a certain period of time - say after 1/2 months. Not a difficult thing to do and I have seen that on other sites. When I first saw this site, I was surprised he wasn't charging for the reviews alone!

)

Mike.
--------------------------------------------

Roy van der Woning said:
Because that would mean that the images have to be hosted by
dpreview itself. Are you going to pay the storage/backup/bandwidth
bills?

Roy.

--
'Get rid of those damn angles! The shortest distance is a straight line.'

DoctorG1 · Jan 30, 2004

Alpo Kaponen said:
Looks like your monitor needs calibrating.. I had no problems of
seeing them and they are horrible!
I also have 24-85 but I have not yet used AI-focusing so can't say
anything about the problem but it's not likely the lens.

I use a Cornerstone 21" monitor as well as a Viewsonic 21" professional monitor , both used for viewing output to large format digital printers (74" wide 1440 DPI ) as well as using it for viewing output to various other printing devices, CAD applications etc.

Calbrated workflows are vital in this field and cost us a fortune to get right , we print for ad agencies , photographers and so forth on these devices and we run a WYSIWYG workflow with controlled lighting for viewing and so forth. The lower bits of that photo were pretty dark and would have printed that way , only in the red barrier was there a lot of evidence of the banding. (I didnt download the original size file , just what was displayed )

Rodney Gold

The nicest thing about smacking your head against the the wall is.......The feeling you get when you stop

Alpo Kaponen · Jan 30, 2004

DoctorG1 said:
I use a Cornerstone 21" monitor as well as a Viewsonic 21"

[snip]

DoctorG1 said:
in the red barrier was there a lot of evidence of the banding. (I
didnt download the original size file , just what was displayed )

Well, that explains it - I allways look the largest possible version of photos when analysing them..

--

RichW · Jan 30, 2004

With the AF running it could be causing an problem with the power if it is not properly regulated. I have heard of it happening before. I certainly would try another lens in servo mode.

Rich

Gabriele said:
John Duesterhoeft said:

Gabriele said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Click to expand...

Roy van der Woning · Jan 30, 2004

Mikey's_World said:
I was just thinking of that when I re-read my post... Phil is
continuously upgrading his servers,

He is?

Mikey's_World said:
so there's money in it somewhere.

Server investments pay back for themselves: faster response and increased capacity/reliability means more visitors. More visitors means more revenue from banner ads. Hosting images doesn't pay for anything.

Mikey's_World said:
Plus, he can continuously set the site to delete messages/photos
after they have been on for a certain period of time - say after 1/2
months.

Now that would be a royal nuisance. What if I want to look up something from a thread that's 3 months old. All images will be gone by then. So should we all just repost the same messages every 1-2 months?

Mikey's_World said:
Not a difficult thing to do and I have seen that on other sites. When
I first saw this site, I was surprised he wasn't charging for the reviews
alone! )

He certainly will have to when he has to pay for the storage, and especially the bandwidth to host hundreds, if not thousands of images files.

Also, using a browse button, how would you control where the image appears in your message? And is it really that much of an effort to upload your files to pbase and do a quick copy&paste of its address? Also, how could I remove an image if I wanted to?

Roy.

Gabriele181256 · Jan 30, 2004

Infact when I try SERVO mode with my 50 F1,8 I can't see the lines.....
I think I'll ship the camera and lens to Canon on Monday

RichW said:
Rich

Gabriele said:

John Duesterhoeft said:

Gabriele said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Click to expand...

Click to expand...

J.B. · Jan 30, 2004

I noticed you used iso 800 on the shot, check what you used on the 50 f1.8, I had to return a 10D because of a line of dead pixels across my sensor that were more visible the higher the iso, at iso 100 you couldnt really see them at all but by 400 they were really noticeable this could be something similar.

Gabriele said:
RichW said:

Rich

Gabriele said:

John Duesterhoeft said:

Gabriele said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Click to expand...

Click to expand...

Click to expand...

--
J.B.

Gabriele181256 · Jan 31, 2004

I've many shots with the 1,8 using ISO 800 and 1600 and I've never noticed this problem
Maybe the lense...interference???

J.B. said:
Gabriele said:

RichW said:

Rich

Gabriele said:

John Duesterhoeft said:

Gabriele said:

Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Click to expand...

--
J.B.

Michel26604 · Jan 31, 2004

Howdy,

this is actually a fairly common problem with the 10D. It is indeed USM interference from 'cheap' lenses at high ISO. I have it with my 28-135 for example.

Here's a previous thread where I discussed this before: http://forums.dpreview.com/forums/read.asp?forum=1019&message=5341091

--
gr. Michel
http://www.yourimage.nl

Gabriele said:
Dear All,
I noticed in many, many photos with a Canon 24-85 USM and 10D,
orrible lines in the bottom of the image when I track objects or
people or something moving and in very good light. These lines qre
very visible and only in the bottom.
Do you know something about it? Have you noticed this problem on
your pics?
I didn't notice with my Ef 1,8
Thank you very much for your help, this forum is great

Richard W · Jan 31, 2004

I noticed this a couple of weeks ago:

http://forums.dpreview.com/forums/read.asp?forum=1019&message=7143895

RW

AI Servo problem please help!!

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