Simplest way (equipment/software) to determine cd/m2 [nits] on a TV? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 5 Old 05-25-2019, 08:27 PM - Thread Starter
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Simplest way (equipment/software) to determine cd/m2 [nits] on a TV?

Hey all,

I'm looking for a simple, accurate way to determine brightness of a TV in SDR. IE, if I want to set it to 120 cd/m2 [nits], or if I want to set 200, something that will let me determine what that brightness [backlight] is.

This is on a Sony TV. It does have AutoCAL, which I'm considering as I know it would do this and more. But I'm also considering just getting something so I can do brightness instead.

Kind of new to all of this, so appreciate the help! Thanks!
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post #2 of 5 Old 05-25-2019, 09:18 PM
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Perhaps this will be of some use.

From the Basic Guide to Color Calibration using a CMS.

Light Meter (optional). I have found that a AEMC CA813 illuminance meter is very useful for front projectors and for all measurements that do not require color readings, such as contrast, black level, and gamma. It is an accurate, inexpensive standalone tool that is also very easy to use.

https://www.avsforum.com/forum/139-d...-enhanced.html

This measures in lux. Here is a source of conversion to nits information.
https://sciencing.com/convert-nits-lux-7448702.html

If I remember enough units conversion, divide lux by Pi to get nits.
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post #3 of 5 Old 05-25-2019, 11:49 PM - Thread Starter
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Quote:
Originally Posted by sfb88 View Post
Perhaps this will be of some use.

From the Basic Guide to Color Calibration using a CMS.

Light Meter (optional). I have found that a AEMC CA813 illuminance meter is very useful for front projectors and for all measurements that do not require color readings, such as contrast, black level, and gamma. It is an accurate, inexpensive standalone tool that is also very easy to use.

https://www.avsforum.com/forum/139-d...-enhanced.html

This measures in lux. Here is a source of conversion to nits information.
https://sciencing.com/convert-nits-lux-7448702.html

If I remember enough units conversion, divide lux by Pi to get nits.
Interesting - thanks; I wonder if it extends to an actual self-let screen as opposed to a projector. I have considered light meters but didn't know much about how their accuracy compared.
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post #4 of 5 Old 05-26-2019, 08:12 AM
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Tom Hoffman posted the guide that I quoted from. You can probably ask him for more information by posting in the Chromapure thread.
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post #5 of 5 Old 05-26-2019, 08:10 PM - Thread Starter
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Thanks. I'm actually contemplating trying AutoCal now with a meter, which would take care of this, but if I change my mind, I definitely will.
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