Why 'more or less stopped using ISO'?

Started Feb 19, 2014 | Questions thread
xpatUSA Forum Pro • Posts: 13,860
Re: Why 'more or less stopped using ISO'?

D Cox wrote:

xpatUSA wrote:

D Cox wrote:

xpatUSA wrote:

With my camera, if shoot a scene at ISO 100 and 1/100 sec and then at ISO 400 and 1/100 sec, the raw data is the same in each image. I guess that makes it a) an 'ISO-less' camera and b) a waste of time messing with the ISO 'knob'.

Is it completely identical, including the metadata ? I would expect the file header to include some indication for the raw converter telling it by how much to multiply the numbers.

To paraphrase Bill Clinton "it all depends what the meaning of 'it' is"

Myself, I said 'raw data', not meta-data and not 'the file'.

I would take the data in a "raw" file to include everything in the file, such as anything in the header that tells the raw converter to multiply all the numbers by some constant.

That would be your privilege.

At the risk of repeating myself, I said "raw data" by which I meant specifically raw image data and nothing else. I did not say "data in a raw file" which means any data, including meta-data, headers, jpegs, image raw, checksums, the kitchen sink and whatever else you might want to add.

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