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VFX question: what is the actual chip size HVX200a / HVX200

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Chris Oben
VFX question: what is the actual chip size HVX200a / HVX200
on Jun 23, 2008 at 5:19:23 am

Jan,

What is the exact chip size of the HVX200a? In order to create a CG camera in Maya I need to know the exact physical dimensions of the chip/s. I am interested in the difference between the 200a and the 200 which Steve Mahrer of Panasonic describes as 960 x 540.

Can you help illuminate the issue?



Chris M. Oben

http://www.chrisoben.com


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Shane Ross
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 23, 2008 at 8:49:47 am

They are both 960x540 with pixel shift. The only difference between the 200 and 200A CCDs is that the 200A chips are more light sensitive...they perform better in low light situations.


Shane



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Jan Crittenden Livingston
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 23, 2008 at 11:34:34 am

As Shane pointed out the 200A is more low light senitive, and this is due to the pixels being larger than the ones on the HVX200.

The pixel count is correct and with the saption offset it is close to the effect of a 1.1 million pixel imager. Since CCDs are analog devices and there isn't a pixel to pixel relationship to the recording it seems to me that that more important count would be the physical size of the recorded footprint in DVCPRO HD. Most editing software will give you that when you do the setup.

Hope that helps,

Jan

Jan Crittenden Livingston
Product Manager, HPX500, HVX200, DVX100
Panasonic Broadcast & TV Systems



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Noah Kadner
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 23, 2008 at 2:52:22 pm

Exactly- I'm assuming with Maya it wants to know recorded pixel dimensions- which is not the same as the physical size of say a 35mm camera's frame. In that case it's 1280x720.

Noah

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Kirk Melby
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 27, 2008 at 4:35:04 am

I know what you want. I have it in a spread sheet somewhere but I cannot find it. It might be on another office computer, so I will look next chance I get.



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Chris Oben
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 27, 2008 at 5:09:41 am

Kirk,

That would be great . . .

C.O.

Chris M. Oben

http://www.chrisoben.com


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gary adcock
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 27, 2008 at 12:54:59 pm

[Kirk Melby] "I know what you want. I have it in a spread sheet somewhere but I cannot find it. It might be on another office computer, so I will look next chance I get."


Fletcher Camera Chicago has one for all camera types on their website, that covers the sensor size and formats.

http://www.fletch.com/images/Video_Camera_Comparson_Chart.pdf


gary adcock
Studio37
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Kirk Melby
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 27, 2008 at 4:48:10 pm

What Chris needs is the actual physical size of the sensor. The sensor size and the lens focal length are used to calculate the field of view, which is what he is ultimately after. We've run up against this as well and unfortunately we were never able to find a factory spec. One of our guys spent a bit of time trying to calculate it and came up with a number that is really close. I just need to get in touch of him to get the number.



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Kirk Melby
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Jun 27, 2008 at 5:31:47 pm

OK, here is what we've been using:
4.6809 x 2.6330 mm active area.
Should be close enough!
Good Luck,
Kirk



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Shane Wilm
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Aug 8, 2008 at 9:41:52 pm

Kirk, did mean to say the HVX200 Film back was 4.6809 x 2.6330 CM? and not MM?

Were getting better results tracking using a film back in Cm's


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Jack Zak
Re: VFX question: what is the actual chip size HVX200a / HVX200
on Aug 9, 2008 at 12:16:05 am

He means mm. If it were cm you would be well into 35mm photography and beyond(medium format).
I have another Q: the brochure states that he 35mm equivalent of the 4.2mm to 55mm lens is 32.5mmto 423mm or so for the HVX200 and the same lens is equivalent to 30.3mm to 394mm or so for the 200A cam.
That would mean that the chip size on the 200A is larger by about 7%
Jan's earlier post about larger pixels to decrease noise would indicate the same. That means that the chip size for both cams can not be the same. Does that mean that the HVX200A chip is 5.008mm x 2.817mm - a 7% increase from 4.6809 x 2.6330 mm posted earlier here?
Jan please!!!!
JZ


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