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Thread: Canon Powershot A75 image has large purple patches - anything wrong?

  1. #1

    Default Canon Powershot A75 image has large purple patches - anything wrong?

    My Confession: I've read forums but never'd posted any. This is my 1st time. I don't know much about photograhpy.

    I'd just bought a Canon Powershot A75 yesterday. While exploring the digital camera, I had a shot which gave an image which is almost completely white with a large patch of purple at the lower bottom corner and a much smaller purple patch at the top middle.

    I'm not so much concern about the white image as I think it might be due to the ISO400 setting. When I reduced it to ISO 200, the image was no longer white and it showed up an acceptable image.

    I'm concerned about the purple patches that appeared in two places in the image as I think tt might be an indication of a faulty CCD sensor!!!???

    If I set the shutter speed to say 1/125, the under-exposed image shows up but still with noticeable purple patch at the bottom right hand corner.

    Camera Settings for the white image were as follows:
    Shutter Speed : 0.15 sec
    F8.0
    Tv Mode (Time-priority Mode; the shutter control mode, I think)
    Exposure Compensation = 0
    AWB (Automatic White Balance)
    ISO 400
    [ ] (i.e. Spot Focus)
    Superfine S (i.e. 640 x 480 pixels)

    Does anyone know what's going on? Is it the CCD Sensor problem? Is it inherent?

    Regards,
    Lark.

  2. #2

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    maybe you post some of your problem shots here to share ?
    See my Photo Gallery at the Clubsnap

  3. #3

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    The simplest that I could think of is to copy and paste the image to the forum here but it didn't work.

  4. #4

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    Quote Originally Posted by Lark
    The simplest that I could think of is to copy and paste the image to the forum here but it didn't work.
    To post the image here, read this article

    http://forums.clubsnap.org/showthread.php?t=94574
    See my Photo Gallery at the Clubsnap

  5. #5

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    Hi Megaweb,

    I don't know if this will work... the image is here:
    [img]Canon Powershot A75 Purple Pacthed-image[/img]

    New amendment dated 13 Nov 2004:
    The above hyperlink is no longer valid.
    After reading the instructions in the Users Guide to Posting Images in ClubSNAP Forums by Darren, I've learnt how to post an image the right way. Here's the image:

    Last edited by Lark; 14th November 2004 at 09:58 PM. Reason: I've just learnt how to post an image in the forum so I want to do it properly by editing the link and I'll be deleting the web page at http://members.lycos.co.uk/michaeltan/

  6. #6
    Moderator ortega's Avatar
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    So simple, act blur and go back to the shop that you bought it from and say why like that one!!!
    You sell me spoilt thing isit?????
    I want to change new one!!!!!

    And then insist to change, ask them to explain why there are purple spots, if you are a pretty girl even easier.

  7. #7

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    So sorry, Megaweb. I was holding on to to my reply page until I got my link worked out. I didn't see your message before this. But I tried the link that I'd created and it worked. Regards.

  8. #8

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    Quote Originally Posted by Lark
    Hi Megaweb,

    I don't know if this will work... the image is here:
    [img]Canon Powershot A75 Purple Pacthed-image[/img]
    wah so serious ... I think you have to send it back to the shop for exchange
    See my Photo Gallery at the Clubsnap

  9. #9

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    Quote Originally Posted by megaweb
    wah so serious ... I think you have to send it back to the shop for exchange
    Really ah? I'll go back to Courts@Funan to exchange. Thanks for your advice!
    Regards.

  10. #10
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    eh... the purple spots are pretty bad :S you took a plain wall right? Better go exchange it... it's gotta be a faulty ccd man :X ugh!

  11. #11

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    Quote Originally Posted by ortega
    So simple, act blur and go back to the shop that you bought it from and say why like that one!!!
    You sell me spoilt thing isit?????
    I want to change new one!!!!!

    And then insist to change, ask them to explain why there are purple spots, if you are a pretty girl even easier.
    Thanks Ortega! I'll go back to the shop within these few days to change for a new one

  12. #12

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    Quote Originally Posted by ParkertR
    eh... the purple spots are pretty bad :S you took a plain wall right? Better go exchange it... it's gotta be a faulty ccd man :X ugh!
    I tried photographing plain walls and other objects but the results were the same. I hope it's not an inherent problem with the Powershot A75!

  13. #13

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    hi i'm using an A75. and these spots are abnormal. There is definitely a production defect. Just hope that the dealer won't direct you to their main office or smthing.

    SHOOT!

  14. #14

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    Quote Originally Posted by nipapa
    hi i'm using an A75. and these spots are abnormal. There is definitely a production defect. Just hope that the dealer won't direct you to their main office or smthing.

    SHOOT!
    Hi nipapa,

    I was told that new stock will be in today so I'll be going down to make an exchange at Courts.

  15. #15
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    so wats wrong?? does the problem lies with the CCD or Lens? any one can clear this doubt?

    i am intending to get myself a canon camera soon too... i am scared...

    i guess we have to test the camera well before buying.

    any pros here can give any tips or guildlines when buying a camera (eg. how to test if the camera is capturing the correct image)

  16. #16

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    Quote Originally Posted by aspire
    so wats wrong?? does the problem lies with the CCD or Lens? any one can clear this doubt?

    i am intending to get myself a canon camera soon too... i am scared...

    i guess we have to test the camera well before buying.

    any pros here can give any tips or guildlines when buying a camera (eg. how to test if the camera is capturing the correct image)
    Hi Aspire and All!
    I've just got the Canon Powershot A75 exchanged at Courts Ang Mo Kio(I bought it at Courts Funan. Their service is not bad - can exchange within 7 days).

    It was confirmed that there was something wrong with the camera and I strongly believe the fault was with the CCD Sensor as suggested. The one that I now have does not have the purple patch problem. It's clean white through out! Here's a sample of the image and it's what I think it should look like:



    My camera settings were:
    File Name : IMG0001.jpg
    Camera Model Name : Canon PowerShot A75
    Shooting Date/Time : 11/16/2004 8:54:51 PM
    Shooting Mode : Manual
    Photo Effect Mode : Off
    Tv( Shutter Speed ): 15
    Av( Aperture Value ): 2.8
    Metering Mode : Spot
    ISO Speed : 400
    Lens : 5.4 - 16.2mm
    Focal Length : 5.4mm
    Digital Zoom : None
    Image Size : 640x480
    Image Quality : Superfine
    Flash : Off
    White Balance : Fluorescent
    AF Mode : Single AF
    Color Space : sRGB
    File Size : 79KB
    Drive Mode : Single-frame shooting
    Owner's Name : Lark

    I'm not sure if over-exposing the CCD will cause any real harm to it or not but at least with this camera setting, I was able to detect the flaw in my first camera!

    So, Aspire, you might want to set your camera like the above to test CCD sensor!?

    Thanks to all!

  17. #17
    Moderator ortega's Avatar
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    Good the hear that you managed to get a 1 to 1 exchange.

  18. #18

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    Quote Originally Posted by ortega
    Good the hear that you managed to get a 1 to 1 exchange.
    Thank you, Ortega!

    There is something I notice in the present camera(for easier reference, I shall call this camera "A75#2" and the camera before the exchange "A75#1"). The A75#2 produced an audible "clicking" sound when zooming in and out the lens. I don't know how to describe the sound but I don't remember hearing this sound with A75#1!

    It appears to be a problem of the mechanical part(s) in the zoom mechanism. Is it normal?

  19. #19
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    thanks Lark.

  20. #20
    Senior Member erictan8888's Avatar
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    ha ha.... learn another thing here today.....
    like that test camera one ah.... i dun know....

    thanks for your tip....
    Hope to learn from everyone here....

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