Thread: Defect on Lens?

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    Defect on Lens?
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    Junior Member Cinephile's Avatar
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    So I just got my DVX200 and I'm testing it out and It seems that my lens is defected. There are two green spots that won't go away no matter where I turn my camera! I tried wiping it with a professional lens pen and brush but the spots won't go away. I don't know if its the lens or the actual sensors that are defected but the spots always are at the same exact spot! Anyone here run into this problem? Could it be just a lens flare?
    Last edited by Cinephile; 04-05-2017 at 10:55 AM.


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    Senior Member JPNola's Avatar
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    Bummer.


    If it is always in the same spot it is not likely a lens flare. I would attempt a black balance, just in case that might clear up the issue.

    To black balance the camera, cover the lens, then press and HOLD the white balance button until you see "BB Set OK". If you cover the lens at the spot goes away, that to me indicates an issue with the lens and not with the sensor.

    What I see in the examples looks more like an optical defect than anything that a Black balance will cure.
    Big sources matter.


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    Senior Member JRJphoto's Avatar
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    ...that looks like flare. Any video examples?
    Jason R. Johnston
    Cinematographer Videographer Photographer

    web: jasonrjohnston.com
    instagram: jasonrjohnston


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    Senior Member Design Media Consultants's Avatar
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    Quote Originally Posted by JPNola View Post
    Bummer.




    To black balance the camera, cover the lens, then press and HOLD the white balance button until you see "BB Set OK". If you cover the lens at the spot goes away, that to me indicates an issue with the lens and not with the sensor.

    What I see in the examples looks more like an optical defect than anything that a Black balance will cure.
    You do not have to cover the lens to black balance the DVX200.


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    Senior Member Design Media Consultants's Avatar
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    If you are shooting under various light conditions and locations, I do not think it would be a lens flare. Are you shooting in manual or auto? Try auto and shoot in as many locations and different light conditions as possible. Show us a short video clip. It does not appear to be a lens defect. Can't tell much from the photo.

    The DVX is a complex camera and it could be some setting that is causing it, or even a corruption in the software. This might be a question for Barry Green. If it is something internal on the chip, etc., Barry would know.


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    Junior Member Cinephile's Avatar
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    So i've been shooting and it seems that the green spot does move around the frame and does not stay at the same spot. It looks like normal lens flare to me now when I actually move the camera. Let me know if this is normal for you guys and gals too.
    Here's the video: https://www.youtube.com/watch?v=sl4l...ature=youtu.be


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    You have a very bright light in the image you provided.

    Try turning off that light, and light the subject from the front with a softer light and see if the green spots go away.

    This looks like a lens flare, not a lens defect, to me.

    Respectfully,


    Dan Keaton
    Convergent Design


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    Quote Originally Posted by Cinephile View Post
    So i've been shooting and it seems that the green spot does move around the frame and does not stay at the same spot. It looks like normal lens flare to me now when I actually move the camera. Let me know if this is normal for you guys and gals too.
    Here's the video: https://www.youtube.com/watch?v=sl4l...ature=youtu.be
    Lens flare. If you have a lens filter installed, try the same shot without it.


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    #9
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    Lens flare - not a defect. You're almost shooting straight into a very bright light. If you need to shoot with this sort of light maybe move the camera further away and to one side and then use a flag to control how the light hits the lens. http://nofilmschool.com/2014/02/the-...trast-to-scene


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    Senior Member JRJphoto's Avatar
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    April fools joke?
    Jason R. Johnston
    Cinematographer Videographer Photographer

    web: jasonrjohnston.com
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