ISO is Greek to me... Well, Not a Greek, anyways...

Started Jul 26, 2014 | Discussions thread
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mostlyboringphotog Senior Member • Posts: 6,597
ISO is Greek to me... Well, Not a Greek, anyways...

True or false:

1. ISO is not a Greek word Isos.

2. Photon Shot Noise (PSN) is the dominant source of noise in a imaging sensor chain over the electronic noise.

3. Dominant by factor of x2, x3...??

4. The sensor is accurately recording the PSN.

5. Smaller pixel pitch limits the DR not noisier.

6. Smaller sensor is noisier, not because pixel pitch is smaller but uses less amount of photon to expose the smaller size of the sensor.

7. The noise you see on high ISO photo is mostly the PSN.

8. High ISO setting did not increase the PSN; it's that you needed high ISO because the subject is too dark and dark subject reflects less photons.

9. Because the PSN is a statically constant, smaller number of photons, higher PSN.

10. High ISO setting makes the PSN more visible as it's amplified to more brightness.

Please feel free to add/delete or go maybe...

Thanks.

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