John Paines wrote:The ISO value itself, within either circuit, has no effect on noise
Dondidnod wrote:
"Thank you for a very informative read. I'm trying to wrap my head around one point regarding noise though.
"...if there is a bit too much noise at 3200 or that’s too much light, you can shoot lower. ISO 1600 or 1250, are likely going to produce better results in terms of noise compared to 3200""
Captainhook wrote:
"...(EDIT - So a couple of) the 3rd party cameras can't have highlight recovery as they clip the data on the camera etc before sending out, and most of them use mostly analog gain for ISO (being DSLRs) so ISO is not available either but you can still adjust exposure +/-5 stops so that doesn't matter."
Re: Sigma fp with BRAW and DNGviewtopic.php?f=2&t=138074&p=743518&hilit=Braw+iso+doesn%27t+matter#p743518So, if there is no analog gain in Blackmagic cameras, and no added noise as a result, if you are shooting in BRAW, does it matter what your ISO setting is within the upper range while shooting, since you can change it in post?
Captainhook wrote:
"Just for clarity my above quote was ".. some 3rd party cameras ..."
To the topic, the "digital" ISO settings in camera can also be thought of as another exposure tool - adding digital gain will still increase the apparent noise and in many cases more than "analog gain" which is why you might find more noise exposing for and using ISO1000 versus ISO1250 (the second "analog gain stage") on the Pockets.
So if you treat it like an exposure tool then changing digital ISO on camera and exposing for that will still have an effect on apparent noise. Yes you can change digital ISO in post but you have already decided on the amount of light hitting the sensor and that wont change, so if you want to under/over expose the sensor it helps to also monitor that way while shooting IMHO.
"Native ISO" in our case is what we have decided is a good trade off between apparent noise when exposed for that digital gain and the dynamic range distribution (not necessarily "even" distribution but what has been decided as 'acceptable' given the amount of noise etc). Its a recommendation for how to expose the sensor."
Re: ISO 6/23/22viewtopic.php?f=2&t=162340&p=859997&hilit=+ETTR+Exposure+to+the+Right+of+the+Histogram%3A+#p859997