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Not sure what is fake. There are ISO standards for digital cameras after all. Wouldn't it be more honest for film cameras to refer to sensitivity rather than ISO?Based on his results, I think he is correct about the fallacy of using ISO in digital cameras. Using Gain instead of ISO would be a more honest term. Cameras with higher gain (higher maximum ISO level) may have sensors with higher signal-to-noise ratios.
Are the ISO ratings enhanced by amplification of the digital signal from the sensor?ISO isn't fake but an image sensor has only 1 ISO rating.
Based on his results, I think he is correct about the fallacy of using ISO in digital cameras. Using Gain instead of ISO would be a more honest term.
It would be interesting if they could design a shutter system which could take multiple photos in very rapid succession and then focus stack them for you to reach the appropriate "iso"/exposure like the astrophotographers do. That way you could increase the signal portion in that signal to noise equation.
There are some interesting angles to digital sensors when it comes to the ISO standard. For instance, a sensor has but one native sensitivity. It can then be altered with either analog, digital, or software amplifiers or attenuators. Then again, the sensitivity of film can be altered with different chemicals and processes too.
I don't think the point of the ISO was to be the final word in how everything is to be done, but rather to give a baseline to allow the end user to form some reasonable expectations prior to usage. In other words, it's just a number to give you some idea of what to expect to allow you to compare products.
Not quite what I was getting at but close. Astrophotographers will take hundreds, if not thousands of the same photograph. Then they'll align each one and layer them over one another until a photo finally emerges. They deal with very weak signals (light emitted by stars billions of km away) and by stacking thousands they increase the signal portion of the signal to noise ratio. If your camera took let's say 10 photos when you depressed that shutter once and then stacked them one on top of each other, this could help overcome poor lighting conditions, allow you to use your cameras lowest iso, allow for the use of a high shutter speed. This is different than taking a photo exposing for the shadows and a second exposing for highlights and then merging them to provide a high dynamic range, but it is similar.That is called HDR and most cameras do that. Not sure what you define as rapid. It is not a focus stack, but an exposure merge. Lot of cameras have built in focus stacking also.
Not quite what I was getting at but close. Astrophotographers will take hundreds, if not thousands of the same photograph. Then they'll align each one and layer them over one another until a photo finally emerges. They deal with very weak signals (light emitted by stars billions of km away) and by stacking thousands they increase the signal portion of the signal to noise ratio. If your camera took let's say 10 photos when you depressed that shutter once and then stacked them one on top of each other, this could help overcome poor lighting conditions, allow you to use your cameras lowest iso, allow for the use of a high shutter speed. This is different than taking a photo exposing for the shadows and a second exposing for highlights and then merging them to provide a high dynamic range, but it is similar.
Not quite what I was getting at but close. Astrophotographers will take hundreds, if not thousands of the same photograph. Then they'll align each one and layer them over one another until a photo finally emerges. They deal with very weak signals (light emitted by stars billions of km away) and by stacking thousands they increase the signal portion of the signal to noise ratio. If your camera took let's say 10 photos when you depressed that shutter once and then stacked them one on top of each other, this could help overcome poor lighting conditions, allow you to use your cameras lowest iso, allow for the use of a high shutter speed. This is different than taking a photo exposing for the shadows and a second exposing for highlights and then merging them to provide a high dynamic range, but it is similar.
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