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General HD (720 / 1080) Acquisition
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Old December 5th, 2004, 06:11 AM   #1
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CCD Chips

Hi there!
Does anybody know what kind of CCDs are used in the Sony and JVC. I mean is it an IT, FIT, FT or M-FIT CCD?
And also I can not find the exact info on the sensibility for the Sony camcorder. It always says 35lx, but the exact info would be the aperture at 2000lx resulting in a 100% videosignal.
Thanks already. Bye
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Old December 5th, 2004, 10:58 AM   #2
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Consumer cams use IT CCD readout. Maybe some (XL2?) use a reduced FIT (on chip buffer). Exact, standarized figures for minimum ilumination and sensitivity for consumer cams are "avoided" because the game (and commercial misleading) must go on...
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Old December 5th, 2004, 11:21 AM   #3
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Below is the spec for the FX1 CCD

Image size Opposite angle 6.0mm (1/3 types), aspect ratio 16: 9
The number of entire pixels 1012 (horizontality) 1111 (vertical) approximately 1120000 pixels
The number of effective pixels 972 (horizontality) 1100 (vertical) approximately 1070000 pixels
Unit flotation cell size 5.45 mm (horizontal) 2.725 mm (verticality)
Lowest subject luminous intensity 6 luces
Sensitivity (F 8) 440 mV
Smear -107dB
Package 14pin plastic metal package
External size 10.0 mm (height) 10.0mm (width) 6.8mm (depth)


this has been translated through the babel, however 2 points of interest are

does 6 luces mean 3 lux?
how many lux is 440mV?
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Old December 5th, 2004, 12:20 PM   #4
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Given the difference between the Japense standard for measuring the sensitivity and whatever we use here...it's 6 lux according to the Japanese standard and 3 for us...so, yes 6 luces does translate to 3 lux for us.
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Old December 6th, 2004, 03:19 AM   #5
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'luces' (Italian language: means 'light') is not an SI unit for luminous flux density(illuminance). It could mean 'lux' (latin) and then would 1 lux equal 1 luce.
(F8) 440mv is meaningless...as always with consumer cams. It probably tells us what the output voltage is when the iris is set at F8. The lux value to get this voltage should be mentioned, and the testcard reflectivity, colortemp of the light, AND the S/N ratio are missing too.
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Old December 6th, 2004, 01:23 PM   #6
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To put it in easier-to-understand terms:

Under identical lighting conditions and identical aperture, the FX1 responded as 160ASA. The XL2 responded at 200ASA, and the DVX at 400.
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Old December 6th, 2004, 01:44 PM   #7
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<<<-- Originally posted by Andre De Clercq : 'luces' (Italian language: means 'light') is not an SI unit for luminous flux density(illuminance). It could mean 'lux' (latin) and then would 1 lux equal 1 luce.
(F8) 440mv is meaningless...as always with consumer cams. It probably tells us what the output voltage is when the iris is set at F8. The lux value to get this voltage should be mentioned, and the testcard reflectivity, colortemp of the light, AND the S/N ratio are missing too. -->>>

Yeah, I assumed luce was a poor translation by babel, especially since the FX1/Z1 is rated at 6 lux in Japan.
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