FX/Z1 rated 9 Lux at telephoto setting at DVinfo.net

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Sony HVR-Z1 / HDR-FX1
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Old April 27th, 2005, 10:56 AM   #1
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FX/Z1 rated 9 Lux at telephoto setting

Here's explanation of 6 Lux Japanese rating. The camera rated 3 lux at F1.6. End telephoto range is F2.8, which means about 9 Lux. You get 6 Lux average. This explains why Canon and other makers have higher lux numbers in Japan. The Japanese ratings are lot more honest.

Did anyone check F-stops/lux ratings at various focal lengths?
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Old April 27th, 2005, 06:15 PM   #2
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Quote:
Originally Posted by Radek Svoboda
Here's explanation of 6 Lux Japanese rating. The camera rated 3 lux at F1.6. End telephoto range is F2.8, which means about 9 Lux. You get 6 Lux average. This explains why Canon and other makers have higher lux numbers in Japan. The Japanese ratings are lot more honest.
I believe the difference is that the Japanses require a signal level of 100IRE (at max gain) while the USA requires a signal level of 50IRE (at max gain).

In both cases, the WIDE setting is used.

A far more professional spec is lux at F-stop with NO gain. I believe this is a 100IRE level.
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Old April 27th, 2005, 07:14 PM   #3
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Without a signal-to-noise ratio, I fail to see how a lux rating is relevent. Does noise enter into the calculation or not?

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Old April 27th, 2005, 11:19 PM   #4
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You cannot compare lux ratings between manufacturers. At this point there is no standard in lux rating comparisons between each other. Sony's lux is different from Panasonic or Canon lux . To make clear: 1 Sony lux does not equal 1 Canon lux or 1 Panasonic lux. They are all different. You can compare the lux rating of cameras within Sony but that's it.

One way to compare cameras is by the relevance of the f-stops and the footcandles associated with a particular f stop, let's say f/11 at 2,000 footcandles. But dont make the assumption that lux rating is standardized. It is not !!!!!

Quote:
Originally Posted by Radek Svoboda
Here's explanation of 6 Lux Japanese rating. The camera rated 3 lux at F1.6. End telephoto range is F2.8, which means about 9 Lux. You get 6 Lux average. This explains why Canon and other makers have higher lux numbers in Japan. The Japanese ratings are lot more honest.

Did anyone check F-stops/lux ratings at various focal lengths?
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Old April 27th, 2005, 11:45 PM   #5
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Augusto is quite right. The way the manufacturers have treated lux ratings so differently, it's a spec you can forget. Besides, when in doubt, just add light.

For Steve M. -- great to see you at NAB! Hope to run into you again on your own turf in July for DV Expo East.
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Old April 28th, 2005, 12:18 AM   #6
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Thanks, Chris. However, I reread Radek's posting and realized he was aware of the lux rating discrepancies between manufacturers. My apologies.

Quote:
Originally Posted by Chris Hurd
Augusto is quite right. The way the manufacturers have treated lux ratings so differently, it's a spec you can forget. Besides, when in doubt, just add light.

For Steve M. -- great to see you at NAB! Hope to run into you again on your own turf in July for DV Expo East.
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