ISO is fake?
Apr 26, 2019 07:15:10 #
Before you tell me not to listen to this Tony guy let me explain. He has the controversy topic of crop sensor which caused a lot of disagreement but I don't want to talk about that. His latest claim that ISO is fake and I email him asking him to do a test of his cameras and see if they conform to the ISO standard and heard nothing back from him.
I don't see how ISO is fake because.
1. The ISO organization is real and based in Switzerland.
2. There is the ISO standard for digital still cameras and the latest is ISO 12232:2019 published Feb 2019.
3. Unless you test the cameras against this standard and they don't meet the standard then you can't claim that they are fake.
I don't see how ISO is fake because.
1. The ISO organization is real and based in Switzerland.
2. There is the ISO standard for digital still cameras and the latest is ISO 12232:2019 published Feb 2019.
3. Unless you test the cameras against this standard and they don't meet the standard then you can't claim that they are fake.
Apr 26, 2019 07:23:07 #
Apr 26, 2019 07:23:08 #
Without searching for the video, let's 'pretend' he was talking about the reality that the digital sensor captures at just 1 (one) ISO setting, the 'base' ISO for that model. This 'base' ISO is typically ISO-100, but some cameras it is ISO-200, or somewhere in this range. When you dial any other ISO value, the 'computer' that is the processor inside the digital camera will process the data from the digital sensor to achieve the specified ISO. And yes, those international standards are how each camera manufacturer determines the amount of 'gain' to add to the sensor data to achieve the specified and standardized ISO setting. The signal from the sensor is 'amplified' and it is this applied amplification to the data that is the source of most digital noise in the resulting image file. This is also why the best noise performance and widest Dynamic Range of the camera occurs at each digital camera's 'base ISO'.
Apr 26, 2019 07:25:21 #
Apr 26, 2019 07:30:03 #
CHG_CANON wrote:
Without searching for the video, let's 'pretend' h... (show quote)
You should watch the video because he claimed that several of his cameras deliver different exposure when set at the same ISO. But he compare them to each other and not against the established standard.
Apr 26, 2019 07:33:00 #
BebuLamar wrote:
You should watch the video because he claimed that several of his cameras deliver different exposure when set at the same ISO. But he compare them to each other and not against the established standard.
Did he not also challenge the validity and standards used by manufacturers for the claimed individual camera base iso?
Apr 26, 2019 07:37:25 #
papaluv4gd
Loc: durham,ct
I've listened to "Tony". he has opinions on any given subject a do we all.Is he some sort of photo god? I think not. him and his wife seem pretty full of themselves. just "my "opinion.
Apr 26, 2019 07:40:35 #
BebuLamar wrote:
You should watch the video because he claimed that several of his cameras deliver different exposure when set at the same ISO. But he compare them to each other and not against the established standard.
I don't know if there's an ISO police force who will investigate further, absolving the innocent and damning the guilty ...
My experience is my EOS 1v (film) meters the exact same as my EOS 5DIII (digital) so that sometimes, particularly in determining the long exposure duration, I can use the DSLR to determine the seconds / minutes for the same ISO. I've also used the digital meter to determine manual settings on a speedlight, again for a given ISO, using those settings for the 1-try on film of the same ISO and flash output.
Worrying about Nikon vs Canon vs Sony vs the population at the same ISO is interesting ish. But, for what practical purpose? Is his video his "strongly worded letter" to the manufacturers and / or the International Organization for Standardization? As if they care ...
Apr 26, 2019 07:40:54 #
CHG_CANON wrote:
Without searching for the video, let's 'pretend' h... (show quote)
I get asked all the time what ISO is. I tell my students, it is artificial light added to the digital image. Your explanation is better than mine. I may use yours from now on.
Apr 26, 2019 07:41:33 #
Apr 26, 2019 07:46:52 #
The sensor is a silicon based integrated circuit which is sensitive to light, in only one way.
Different sensors have different characteristics.
Changing the ISO in the camera will not alter the characteristics of the sensor's sensitivity to light.
Changing the ISO simply modifies the way the information from the sensor is handled (processed).
Different sensors have different characteristics.
Changing the ISO in the camera will not alter the characteristics of the sensor's sensitivity to light.
Changing the ISO simply modifies the way the information from the sensor is handled (processed).
Apr 26, 2019 07:49:23 #
BebuLamar wrote:
Before you tell me not to listen to this Tony guy ... (show quote)
It does not matter what you call it, the reality is that cameras produce noise in certain conditions, this noise is called ISO, you need to adjust and/or post process your image to compensate. No standards, no debates, only reality. Just my opinion. Accept the facts and make your individual adjustments, and know your cameras limits, simple as that.
Apr 26, 2019 07:50:40 #
orrie smith wrote:
It does not matter what you call it, the reality is that cameras produce noise in certain conditions, this noise is called ISO, you need to adjust and/or post process your image to compensate. No standards, no debates, only reality. Just my opinion. Accept the facts and make your individual adjustments, and know your cameras limits, simple as that.
The noise is not called ISO.
ISO is a "sensitivity" rating.
Apr 26, 2019 07:54:06 #
Longshadow wrote:
The noise is not called ISO.
ISO is a "sensitivity" rating.
ISO is a "sensitivity" rating.
Does that mean the iso of the tenor of this thread is increasing?
Apr 26, 2019 07:54:16 #
CHG_CANON wrote:
I don't know if there's an ISO police force who wi... (show quote)
I don't want to spend the 118 swiss franc to buy the standard and even if I bought it I can't share it in the forum anyway. However, I suspect that camera manufacturers do follow the ISO standard and yet at the same ISO the sensor can deliver different exposures. I suspect the reason is that the ISO standard provides a lot of lee way in how to determine the sensitivity of the sensor.
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