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Old December 17th, 2005, 11:52 PM   #1
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chromatic aberation

Hi everyone,

Today at work while I was capturing I saw Chromatic Aberation, My heart broke in 2! My HD100 skipped the issue of SSE but when I saw it, I thought it can't happen to me, but it did :(

Anyways is CA caused by the lens, the ccds or some other factor?
and if it is the lens or the ccd is it a fault and therefore replacable under warranty?

Help me out fellow HD100ers, btw the footage is great if it didn't have CA pink tinge up on top and aqua tinge down the bottom.
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Old December 18th, 2005, 01:30 AM   #2
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It's caused by either the lens or the prism. I think it's mostly due to the lens, but haven't had a chance to play with the optional $11,995 13x3.5 wide-angle lens.

The aberration is omnipresent in all HD100 lenses. It's part and parcel of designing a high-def lens at an $800 price point. You'll notice C.A. more on the telephoto end -- the longer you zoom in, the more you'll see it.
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Old December 18th, 2005, 01:55 AM   #3
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so Barry you're telling me all Fujinon lenses that came with the HD100 has CA? Therefore it is not a fault under warranty? JVC won't replace the lens?

sorry about all these questions.
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Old December 18th, 2005, 04:26 AM   #4
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That is correct. Unless your lens is extraordinarily defective, that is. But if it's performing like all the others, then no, it would not be a warrantee-able defect. You can of course ask your JVC service center.

I would expect that if you had a seriously defective lens, you would have noticed it right away. You might try posting some pictures here and fellow HD100 users can tell you if what you're seeing looks comparable to what they've been experiencing.
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Old December 18th, 2005, 07:45 AM   #5
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Barry have a look

http://www.sakproductions.net/chroma.html

Give me your verdict, Settings WB temp was on 5600, blacks and everything else was on standard, see if you look at the third pic, the camera tilts down yeah, well that green spot you see on the second pic is now now pink on the third.

Have you seen worse? or is this the average?

Thanks for this Barry
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Old December 18th, 2005, 08:40 AM   #6
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Avoid using full opened iris, you'll notice a big difference in CA without losing much light. Those CA from your camera are similar to the ones I have on mine when iris is fully opened. I read somewhere that there are no CA with the other lens.
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Old December 18th, 2005, 08:49 AM   #7
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I found where I read it:

http://www.dvinfo.net/conf/showthread.php?t=53148
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Old December 18th, 2005, 09:00 AM   #8
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so how open can we have the iris at?

Is yours worse or better?

I guess we will have to live with it, wonder if the XL-h1 has any CA
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Old December 18th, 2005, 09:28 AM   #9
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Keep it somewhere between opened and 1.4. You'll see the difference on the VF, just point it to a white wall.

I think mine is not better or worse, it has that pink tone when iris is fully opened. Xl-h1 also have some CAs, but not so many. It may have better glass, but I prefer working with a manual focus one. As Barry said, it's a limitation of a cheap HD lens.
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Old December 18th, 2005, 09:51 AM   #10
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Hey Diogo thanks for that dude, I hope and pray that fujinon will release another lens for this camera priced between the 16 times and the 13 times widescreen, I remember someone on this forum speaking to a rep for fujinon and they were saying they will release one, If its goin to cost about 2 or 3 grand it might be worth it.
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Old December 18th, 2005, 10:07 AM   #11
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Lets wait and see. Keep us posted if that iris trick worked for you.
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Old December 18th, 2005, 10:27 AM   #12
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This is something beyond the typical form of CA. It looks like the top half has a 'purple haze' and the bottom is green. That's not right!

What type of lighting? Flourescent, Halogen, etc?
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Old December 18th, 2005, 10:50 AM   #13
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This was shot at an exhibition centre "tokyo big dome" it was for the biggest art festival in asia, funny enough my panny 3chip cam had no sign of colour disfiguration and it was a cheap cam, so I'm guessing it's not the lighting but just for trivia what lights would an exhibition centre have?

Tim by the way, I have finally installed your recipes in my memory card for the JVC will try it soon. Thanks for that, and just for the record I shot a wedding piece but my iris wasn't fully opened and I saw very little or no CA at all. Hmmmm, What do you reckon Tim, call JVC tomorrow?
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Old December 18th, 2005, 06:23 PM   #14
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Well seen Tim. I didn't notice the green area, I was looking at the 'purple haze' because it looks like my camera's CA. No such green like that on mine.
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Old December 20th, 2005, 04:02 AM   #15
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Hello

My first post here :)

Some examples of my HD101E camera and CA
http://www.ideavideo.fi/pic/harakat_hdv.jpg

And one wmvhd video (60MB)
http://194.100.194.44/hdv_test1.wmv

Jari
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