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

  1. #21

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    Quote Originally Posted by Lark
    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?
    It could be a firmware upgrade. When you open the CF card cover, do you see a black dot at the cover? new upgraded A75s have this black dot.

    Regards

  2. #22

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    Quote Originally Posted by nipapa
    It could be a firmware upgrade. When you open the CF card cover, do you see a black dot at the cover? new upgraded A75s have this black dot.

    Regards
    No, I didn't see any black dot on the cover. Is the black dot printed on the Compact Flash cover? Or was it simply a black dot marked using a marker pen?May I know where you'd got the "firmware update" information from? Which web site? A black dot can be easily marked by anyone who knows about the firmware update thing. How should one ascertain that the firmware in the camera is genuinely updated? Perhaps there is a firmware version, ex. ver 1.3???

    Regards,
    Lark

  3. #23

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    New test that I did:
    I was not satisfied with the image sharpness I got out of the A75#2 so I took a shot of a piece of paper that is printed with square grids.

    The image turned out to be unsatisfactory to me. Could it be another problem of the A75#2? If you notice, the edges of the image were blurred. I think the middle of the image is ok but the edges of the image was blurred and the lines of the girds were curved(the lines on the paper were all straight lines!).

    Is the level of "distortion" acceptable?

    Here is the image:



    The camera settings for the above image were as follows:
    File Name IMG_3473.JPG
    Camera Model Name Canon PowerShot A75#2
    Shooting Date/Time 11/19/2004 4:19:12 PM
    Shooting Mode Manual
    Photo Effect Mode Off
    Tv( Shutter Speed ) 1/10
    Av( Aperture Value ) 2.8
    Metering Mode Evaluative
    ISO Speed 50
    Lens 5.4 - 16.2mm
    Focal Length 5.4mm
    Digital Zoom None
    Image Size 640x480
    Image Quality Fine
    Flash Off
    White Balance Auto
    AF Mode Single AF
    AF Range Mode Macro
    Color Space sRGB
    File Size 90KB
    Drive Mode Single-frame shooting
    Owner's Name Lark


    Regards,
    Lark

  4. #24
    Member
    Join Date
    Nov 2004
    Location
    Northern Singapore
    Posts
    66

    Default

    Quote Originally Posted by Lark
    Thank you, Ortega!

    .... 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 ...

    It appears to be a problem of the mechanical part(s) in the zoom mechanism. Is it normal?
    My newly purchased A95 oso comes with this sound. Must be the tiny gears moving when zooming in/out.

    Any gurus here can comment on this?

  5. #25

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    Quote Originally Posted by greenarrow2k4
    My newly purchased A95 oso comes with this sound. Must be the tiny gears moving when zooming in/out.

    Any gurus here can comment on this?
    Hi Greenarrow2k4,

    May I have your opinion of the macro shot above(the one with square grids)? May I request you to also set your camera to the settings described and see if you'll get a similar image. The nearer the camera is to the square grid, the more obvious the curvatures. Parhaps you could try taking a shot on a piece of graph paper?!

    It would be great if you could post the image here for reference.

    Regards.

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