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fringing issue with a canon powershot s2

 
 
name
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      08-04-2005

Hello.
Here is a picture I took today with my brand new canon powershot s2 of
my... erhm... tomato plants:

http://www.ibbu.nl/~nsprakel/wiet.jpg

One thing I noticed right away is the major fringing on the left side
of the image on the left side of the pots. Is this something that might
indicate there is a problem with the camera or is it something caused
by a peculiar combination of camera settings and lighting conditions?

I did expect there to be some fringing based on the reviews I read at
"Steve's Digicams" and "DPReview.com", but this seems a bit extreme and
it's not even at the outer edges of the image.

Thanks in advance for any feedback, kind regards, Niek

 
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David J Taylor
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      08-04-2005
name wrote:
> Hello.
> Here is a picture I took today with my brand new canon powershot s2 of
> my... erhm... tomato plants:
>
> http://www.ibbu.nl/~nsprakel/wiet.jpg
>
> One thing I noticed right away is the major fringing on the left side
> of the image on the left side of the pots. Is this something that
> might indicate there is a problem with the camera or is it something
> caused by a peculiar combination of camera settings and lighting
> conditions?
>
> I did expect there to be some fringing based on the reviews I read at
> "Steve's Digicams" and "DPReview.com", but this seems a bit extreme
> and it's not even at the outer edges of the image.
>
> Thanks in advance for any feedback, kind regards, Niek


I believe that the results from the Leica lens in the Panasonic range
(FZ5, FZ20) are better than this. It seems to me that Canon may have
chosen to keep the image quality limited at the expense of other
"features" in the camera. The S2 IS is their second attempt at an image
stabilised ZLR, after all.

David


 
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Pete R
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      08-04-2005
"name" <(E-Mail Removed)> wrote in message news:(E-Mail Removed) oups.com...
>
> Hello.
> Here is a picture I took today with my brand new canon powershot s2 of
> my... erhm... tomato plants:
>
> http://www.ibbu.nl/~nsprakel/wiet.jpg
>
> One thing I noticed right away is the major fringing on the left side
> of the image on the left side of the pots. Is this something that might
> indicate there is a problem with the camera or is it something caused
> by a peculiar combination of camera settings and lighting conditions?
>
> I did expect there to be some fringing based on the reviews I read at
> "Steve's Digicams" and "DPReview.com", but this seems a bit extreme and
> it's not even at the outer edges of the image.
>
> Thanks in advance for any feedback, kind regards, Niek


The image is out of focus, for starters. And you need to meter on
the brightest part of the image, in this case either on the white bricks
or on one of the planters, where the sunlight is most intense.

You can also try turning down EC 1/3 or 2/3 and you'll get much
better results.

And if you want to send me a sample from that third tomato plant
I'll take very good care of it..


 
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Frank ess
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      08-04-2005
name wrote:
> Hello.
> Here is a picture I took today with my brand new canon powershot s2
> of
> my... erhm... tomato plants:
>
> http://www.ibbu.nl/~nsprakel/wiet.jpg
>
> One thing I noticed right away is the major fringing on the left
> side
> of the image on the left side of the pots. Is this something that
> might indicate there is a problem with the camera or is it something
> caused by a peculiar combination of camera settings and lighting
> conditions?
>
> I did expect there to be some fringing based on the reviews I read
> at
> "Steve's Digicams" and "DPReview.com", but this seems a bit extreme
> and it's not even at the outer edges of the image.
>
> Thanks in advance for any feedback, kind regards, Niek


You may have come up against the notorious "Purple Haze" effect that
only surfaces in photographing selected subject matter.

It's a joke.

--
Frank ess

 
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wavelength
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      08-05-2005
I often forget to actually focus on one of the subjects before I frame
the picture also.

Try putting the pipe down and locking on one of the... ehrm, tomato
plants, as you said, before framing the picture on all of them.

 
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Hans-Georg Michna
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      08-07-2005
On 4 Aug 2005 10:11:20 -0700, "name" <(E-Mail Removed)>
wrote:

>Here is a picture I took today with my brand new canon powershot s2 of
>my... erhm... tomato plants:
>
>http://www.ibbu.nl/~nsprakel/wiet.jpg
>
>One thing I noticed right away is the major fringing on the left side
>of the image on the left side of the pots. Is this something that might
>indicate there is a problem with the camera or is it something caused
>by a peculiar combination of camera settings and lighting conditions?
>
>I did expect there to be some fringing based on the reviews I read at
>"Steve's Digicams" and "DPReview.com", but this seems a bit extreme and
>it's not even at the outer edges of the image.


Niek,

some purple and green fringing is apparently unavoidable in all
current superzooms, particularly at the long end of the zoom
range.

It is most pronounced near the edges, particularly the corners
of the pictures. The fringes are usually up to a few pixels
wide, like 5.

They should not occur in the center of the pictures.

Hans-Georg

--
No mail, please.
 
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name
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      08-16-2005

Pete R wrote:
> "name" <(E-Mail Removed)> wrote in message news:(E-Mail Removed) oups.com...
> >
> > Hello.
> > Here is a picture I took today with my brand new canon powershot s2 of
> > my... erhm... tomato plants:
> >
> > http://www.ibbu.nl/~nsprakel/wiet.jpg
> >
> > One thing I noticed right away is the major fringing on the left side
> > of the image on the left side of the pots. Is this something that might
> > indicate there is a problem with the camera or is it something caused
> > by a peculiar combination of camera settings and lighting conditions?
> >
> > I did expect there to be some fringing based on the reviews I read at
> > "Steve's Digicams" and "DPReview.com", but this seems a bit extreme and
> > it's not even at the outer edges of the image.
> >
> > Thanks in advance for any feedback, kind regards, Niek

>
> The image is out of focus, for starters. And you need to meter on
> the brightest part of the image, in this case either on the white bricks
> or on one of the planters, where the sunlight is most intense.


OK, I experimented some more and indeed the purple fringing is much
less pronounced
when the picture is more in focus (still not sure if it's completely in
focus here):

http://www.ibbu.nl/~nsprakel/wiet.jpg

I like being able to move the exposure/focus frame around on the S2 and
I think
the exposure is better on this pic, without any EC.

>
> You can also try turning down EC 1/3 or 2/3 and you'll get much
> better results.
>
> And if you want to send me a sample from that third tomato plant
> I'll take very good care of it..


Contact me by email and I'm sure we can come to some kind of agreement.


 
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