- Messages
- 8,275
- Name
- Ian
- Edit My Images
- No
Please help...
So, I (think that I) get that when you push film you intentionally under expose it and over develop. I understand the concept. I also understand how this affects contrast in the overall image. Similarly, I (think that I) understand the concept of Over Expose and Under Develop where you "pull" the film to try and retain dynamic range or reduce contrast. Historically, I've always pushed film to make it work in lower light and that's been about the extent of it.
What's been keeping me awake at night is that [in my head] increasing your ISO from 400 to 800 is actually over exposing the film, whilst the internet reckons it's the other way around. In my (digital) head - if I take a correctly exposed image at 400, then I up my ISO to 800, I will get an over exposed image (because I've given the sensor too much light). In short - I cannot understand how increasing the ISO under exposes....
I'm missing something fundamental in the language here but I can't see it and have not found an internet explanation that makes any sense. I think the wire in my brain is just missing, so an ELI5 would be very much appreciated.
So, I (think that I) get that when you push film you intentionally under expose it and over develop. I understand the concept. I also understand how this affects contrast in the overall image. Similarly, I (think that I) understand the concept of Over Expose and Under Develop where you "pull" the film to try and retain dynamic range or reduce contrast. Historically, I've always pushed film to make it work in lower light and that's been about the extent of it.
What's been keeping me awake at night is that [in my head] increasing your ISO from 400 to 800 is actually over exposing the film, whilst the internet reckons it's the other way around. In my (digital) head - if I take a correctly exposed image at 400, then I up my ISO to 800, I will get an over exposed image (because I've given the sensor too much light). In short - I cannot understand how increasing the ISO under exposes....
I'm missing something fundamental in the language here but I can't see it and have not found an internet explanation that makes any sense. I think the wire in my brain is just missing, so an ELI5 would be very much appreciated.
Last edited: