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I noticed some faint horizontal lines on a 300D print yesterday. I had
seen them on my new CRT monitor previously but I assumed that it was a
CRT oddity (I'm still getting used to moire after using an LCD for 3-4
years). At the time of the print I thought that I had a blocked jet,
but after some more editing just now I've realised that since both the
CRT and printer display it, the issue appears to be with the camera.

Is this normal? It shows in areas where there is a fair amount of one
colour, like sky. I'm hoping it's a normal quirk of the sensor rather
than something more serious like a half dead multiplexing transistor.

Here's a sample 1:1 crop of some sky, it's not the best example but
hopefully the lines are apparent.

http://media.sensationcontent.com/ro...ntal-lines.tif

"Rowan Crowe" <> wrote in message
news: om...


> http://media.sensationcontent.com/ro...ntal-lines.tif

i'd love to eyeball the pic, but no way I'm going to download a tif of
indeterminate size.. you have a resampled small jpeg or a jpeg crop of the
offending area you could post?

k

"k" <> wrote in message
news:4107e128$0$22412$...
>
> "Rowan Crowe" <> wrote in message
> news: om...
>
>
> > http://media.sensationcontent.com/ro...ntal-lines.tif
>
> i'd love to eyeball the pic, but no way I'm going to download a tif of
> indeterminate size.. you have a resampled small jpeg or a jpeg crop of the
> offending area you could post?
>
> k

It's 259.9KB.

Rowan Crowe wrote:

> I noticed some faint horizontal lines on a 300D print yesterday. I had
> seen them on my new CRT monitor previously but I assumed that it was a
> CRT oddity (I'm still getting used to moire after using an LCD for 3-4
> years). At the time of the print I thought that I had a blocked jet,
> but after some more editing just now I've realised that since both the
> CRT and printer display it, the issue appears to be with the camera.
>
> Is this normal? It shows in areas where there is a fair amount of one
> colour, like sky. I'm hoping it's a normal quirk of the sensor rather
> than something more serious like a half dead multiplexing transistor.
>
> Here's a sample 1:1 crop of some sky, it's not the best example but
> hopefully the lines are apparent.
>
> http://media.sensationcontent.com/ro...ntal-lines.tif

The image is 340x247.. It's thumbnail size.. Too small to see
any detail.

Try at least 800x600 using JPEG.

"Rowan Crowe" <> wrote in message
news: om...
> I noticed some faint horizontal lines on a 300D print yesterday. I had
> seen them on my new CRT monitor previously but I assumed that it was a
> CRT oddity (I'm still getting used to moire after using an LCD for 3-4
> years). At the time of the print I thought that I had a blocked jet,
> but after some more editing just now I've realised that since both the
> CRT and printer display it, the issue appears to be with the camera.
>
> Is this normal? It shows in areas where there is a fair amount of one
> colour, like sky. I'm hoping it's a normal quirk of the sensor rather
> than something more serious like a half dead multiplexing transistor.
>
> Here's a sample 1:1 crop of some sky, it's not the best example but
> hopefully the lines are apparent.

Can't tell from your sample. I have a 300D and sometimes get faint
horizontal lines from my printer, but never see them on my monitor.

"Charles Schuler" <> wrote in message
news:5o2dnQpTOtvXnJXcRVn-
> "Rowan Crowe" <> wrote in message
> news: om...
>> I noticed some faint horizontal lines on a 300D print yesterday. I
>> had seen them on my new CRT monitor previously but I assumed that
>> it was a CRT oddity (I'm still getting used to moire after using
>> an LCD for 3-4 years). At the time of the print I thought that I
>> had a blocked jet, but after some more editing just now I've
>> realised that since both the CRT and printer display it, the issue
>> appears to be with the camera.
>>
>> Is this normal? It shows in areas where there is a fair amount of
>> one colour, like sky. I'm hoping it's a normal quirk of the sensor
>> rather than something more serious like a half dead multiplexing
>> transistor.
>>
>> Here's a sample 1:1 crop of some sky, it's not the best example but
>> hopefully the lines are apparent.
>
> Can't tell from your sample. I have a 300D and sometimes get faint
> horizontal lines from my printer, but never see them on my monitor.

Zoom in, the lines are very small, like 6 or 7 pixels, but certainly looks
wrong and different to my photos from my 300D.

(Rowan Crowe) wrote:

> http://media.sensationcontent.com/ro...ntal-lines.tif

Zip. Mark up the image (draw some arrows or whatever) to point to
what you see. Otherwise, the only remarkable artifacts in this image
are due to JPEG, which you must already know about.

"scott" <> wrote in message
newsqUNc.454$...
>
>
> "Charles Schuler" <> wrote in message
> news:5o2dnQpTOtvXnJXcRVn-
> > "Rowan Crowe" <> wrote in message
> > news: om...
> >> I noticed some faint horizontal lines on a 300D print yesterday. I
> >> had seen them on my new CRT monitor previously but I assumed that
> >> it was a CRT oddity (I'm still getting used to moire after using
> >> an LCD for 3-4 years). At the time of the print I thought that I
> >> had a blocked jet, but after some more editing just now I've
> >> realised that since both the CRT and printer display it, the issue
> >> appears to be with the camera.
> >>
> >> Is this normal? It shows in areas where there is a fair amount of
> >> one colour, like sky. I'm hoping it's a normal quirk of the sensor
> >> rather than something more serious like a half dead multiplexing
> >> transistor.
> >>
> >> Here's a sample 1:1 crop of some sky, it's not the best example but
> >> hopefully the lines are apparent.
> >
> > Can't tell from your sample. I have a 300D and sometimes get faint
> > horizontal lines from my printer, but never see them on my monitor.
>
> Zoom in, the lines are very small, like 6 or 7 pixels, but certainly looks
> wrong and different to my photos from my 300D.

Those look like jpeg artifacts from really high compression settings. (Yes,
I know it's a tiff, but once you've got jpeg artifacts, saving as tiff won't
get rid of them.)

David J. Littleboy
Tokyo, Japan

Rowan Crowe <> wrote:
>I noticed some faint horizontal lines on a 300D print yesterday. I had
>seen them on my new CRT monitor previously but I assumed that it was a
>CRT oddity (I'm still getting used to moire after using an LCD for 3-4
>years). At the time of the print I thought that I had a blocked jet,
>but after some more editing just now I've realised that since both the
>CRT and printer display it, the issue appears to be with the camera.
>
>Is this normal? It shows in areas where there is a fair amount of one
>colour, like sky. I'm hoping it's a normal quirk of the sensor rather
>than something more serious like a half dead multiplexing transistor.
>
>Here's a sample 1:1 crop of some sky, it's not the best example but
>hopefully the lines are apparent.
>
>http://media.sensationcontent.com/ro...ntal-lines.tif

My personal guess is that you shot that image at a high ISO and that the
camera applied a lot of colour noise reduction. When you apply a lot of
colour noise reduction you get that effect.
--

Alfred Molon
------------------------------
http://groups.yahoo.com/group/Olympus_405080/
Olympus 5050 resource - http://www.molon.de/5050.html
Olympus 5060 resource - http://www.molon.de/5060.html
Olympus 8080 resource - http://www.molon.de/8080.html

Rowan,
Can you go into photoshop and look at the individual red, green, and blue
channels? You may find one of them is inordinately noisy. But post a full
size JPG or a crop (at 100%) then maybe we could figure it out.

"Rowan Crowe" <> wrote in message
news: om...
> I noticed some faint horizontal lines on a 300D print yesterday. I had
> seen them on my new CRT monitor previously but I assumed that it was a
> CRT oddity (I'm still getting used to moire after using an LCD for 3-4
> years). At the time of the print I thought that I had a blocked jet,
> but after some more editing just now I've realised that since both the
> CRT and printer display it, the issue appears to be with the camera.
>
> Is this normal? It shows in areas where there is a fair amount of one
> colour, like sky. I'm hoping it's a normal quirk of the sensor rather
> than something more serious like a half dead multiplexing transistor.
>
> Here's a sample 1:1 crop of some sky, it's not the best example but
> hopefully the lines are apparent.
>
> http://media.sensationcontent.com/ro...ntal-lines.tif