Discussion on the Need to impose Upper Limits to AUTO ISO -
Dec 24, 2019 06:25:21 #
Blenheim Orange wrote:
Tony Northrop makes the case in this video that ISO is meaningless for digital cameras.
"ISO is totally FAKE. Seriously."
https://youtu.be/QVuI89YWAsw
"ISO is totally FAKE. Seriously."
https://youtu.be/QVuI89YWAsw
[deleted]
Jan 16, 2020 13:08:58 #
Chris T wrote:
Here's the scenario - you take delivery of a new D... (show quote)
I would never set a new camera to anything auto, first I want to make myself used to the new toy, so I set everything to manual! Once I get a good feel for things and starting to know "her", I will play with some of the auto settings as well! I have to admit, I have never used auto ISO yet in any camera!
Jan 16, 2020 15:39:51 #
I just use some form of auto exposure. When very occasionally I want to go full manual I adjust using the exposure meter on the left side of the EVF. At worst that’s almost always a good starting point.
I would be all for replacing “ISO” with “GAIN” which (enlighten me if I’m wrong) more aptly describes what is happening to the voltages generated by each photo-element on the sensor.
I would be all for replacing “ISO” with “GAIN” which (enlighten me if I’m wrong) more aptly describes what is happening to the voltages generated by each photo-element on the sensor.
Jan 16, 2020 15:39:52 #
I just use some form of auto exposure. When very occasionally I want to go full manual I adjust using the exposure meter on the left side of the EVF. At worst that’s almost always a good starting point.
I would be all for replacing “ISO” with “GAIN” which (enlighten me if I’m wrong) more aptly describes what is happening to the voltages generated by each photo-element on the sensor.
I would be all for replacing “ISO” with “GAIN” which (enlighten me if I’m wrong) more aptly describes what is happening to the voltages generated by each photo-element on the sensor.
Jan 17, 2020 08:55:56 #
Mongo
Loc: Western New York
An ISO setting is not "gain." On one camera system it could be, but normally it is several parameters. As an example, on some sensors, there is pixel aggregation, at high "ISO" settings, which will result in lower spatial resolution, which may look like more "grain."
Pixel aggregation may be used because the electrons from several wells are aggregated together to provide a higher signal, not as suspectable to the low signal noise observed near the lower quantization level of one pixel or cell.
A typical aggregation in an area sensor is 2x2. In this case four wells are aggregated, and there is signal with lower perceived noise from four wells than from four individual wells. In reality a lower light level has a smoother quantization curve at lower light levels because there are more quantization points for a a given low light level range.
Pixel aggregation may be used because the electrons from several wells are aggregated together to provide a higher signal, not as suspectable to the low signal noise observed near the lower quantization level of one pixel or cell.
A typical aggregation in an area sensor is 2x2. In this case four wells are aggregated, and there is signal with lower perceived noise from four wells than from four individual wells. In reality a lower light level has a smoother quantization curve at lower light levels because there are more quantization points for a a given low light level range.
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.