In article , Ken Hart
wrote:
In a digital camera, presumably the sensor does not adjust itself to have
greater sensitivity. Or does it?
Any given sensor will have a base sensitivety, or ISO. Typically ISO 200, or
ISO 100 depending on manufacturer.
Really?
really.
I've never looked into that, but I would have thought that the
base sensitivity would be closer to the mid-point of the camera's ISO
setting range. But that's just electronics design practice.
actually, it isn't.
I tried to understand this page but it got far too technical....
https://photography.tutsplus.com/art...ical-explorati
on--photo-11963
That article is spelling out the fact that digital ISO is not the equivalent
of analoge ISO.
That article does have a high nerd factor. Generally when an article
emphasizes that we are using log-10 not log-e, you need a couple letters
after your name!
the fact that the article is talking about p-n junctions and reverse
biasing diodes indicates that its intended target audience are
electrical engineers, not ordinary photographers.