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JVC GY-HM 600/700/800 Series Camera Systems
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Old August 17th, 2009, 10:30 AM   #1
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Green Halo zoom in gy-hm700

Hi Back again maybe you can't not play the upload file

Anyway I upload in a different format

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The green apear when I zoom in,

I just want your thoughts about it


By the way, who can recommend me a good Mic to replace the orignal microphone on my Gy-hm 700

Thanks a lot

Mike
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Old August 17th, 2009, 10:49 AM   #2
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Looks to me like the white shading is off. The green seems to be right across the top and appears to be more apparent by the bright light back ground.

I'm only a newby but have you balanced the shading?

Steve
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Old August 17th, 2009, 10:57 AM   #3
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I did the white balance

the white shading is setup on preset mode

so what can I do?
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Old August 17th, 2009, 11:36 AM   #4
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You can set the white shading!
And make another test, to see the difference.
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Old August 17th, 2009, 11:49 AM   #5
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I have seen that with my HM100 when there is a bright light just past the edge of the image.
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Old August 17th, 2009, 11:51 AM   #6
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I actually have seen it on a few cameras over the years when there is a bright light just past the edge of the image.
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Old August 17th, 2009, 12:11 PM   #7
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Hi Eric :-)

I did just now and it's not better

Just did this 2 shots


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same thing

maybe something wrong with the camera ??

Thanks

Mike
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Old August 17th, 2009, 01:43 PM   #8
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there is some picts about this Problem, I don't know what to do now :-(











thanks
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Old August 17th, 2009, 01:43 PM   #9
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I had this problem and........

It was the fujinon lens mine was the 17-1 lens
I now have the canon I and have no problems. Its the coatings on the fujinon lens and the green you are seeing is the light coming into the lens is flaring and causing a lens flair.
You can try to minimize this by reducing the flair with a card or for instance try putting you hand while this is happening on the top near the lens shade and see if that helps. All lenses can exibit flair . My lighting guy is always setting up filters in the studio to reduce flair from the lights . The canon lenses seem to be alittle better maybe more coatings ?
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Old August 17th, 2009, 01:59 PM   #10
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Thanks Doug

but I have the canon, so the problem is coming from the lens or the camera ?

I just bought this camera almost 2 weeks ago,

:-(
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Old August 17th, 2009, 05:28 PM   #11
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Do work on your lens with a filter to protect the lens, this could be another point for the greenish light.
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Old August 18th, 2009, 01:29 AM   #12
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I have a 82 mm UV filter to protect my lens , with or without same thing :-(
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Old August 18th, 2009, 02:01 AM   #13
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I see in some tests that lens protection-filters can
cause color-effects, mirroreffects and something else,
also the CAs will be more visible with many UV-protection filters,
because the problem is the multilaxer-coating which
causes reflections.
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Old August 18th, 2009, 07:30 AM   #14
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Viewing the last pic img136 it really looks like the reflection of a window just above the frame. I can see dark divisions in the green - like from the vertical parts of a window-frame.

If so the light is bouncing from either a filter on the front of the lens or somewhere inside the camera like from the sensor or the area above/(actually below in this case as the reflection is at the top) back onto the rear of the lens.

Have you tried flagging the lens on top - you could try a piece of card or black-wrap. If it works the answer would to stop that light from getting to the lens - a flarebuster or mattebox/shade with a french flag like the Genus and/or rectangular matte or "eyebrows" at the front of the lens like Vocas and others.

The rubber hoods that come with a lens really don't do a lot to shield the lens at all.

Last edited by Les Howarth; August 18th, 2009 at 12:46 PM. Reason: the usual typos
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Old August 18th, 2009, 10:36 AM   #15
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Hi
I tried witout Uv filter and still the same,
I tried to flag with my hand in the top lens hood and the green light disapear.
So this is the problem, but I don't think it's normal at all,
I never encounter this problem with my canon XL2.
I try to contact my local dealer to do me an exchange

but what do you think the green light come from the lens or the camera ?
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