I'm not sure if this is a relevant or important question but it's something that has been bugging me and i can't find the answer.
Knowing that the camera uses 3 variables to calculate, ISO,Aperature and Shutter based not he exposure you want.
By choosing any 2 of the 3, the camera will calculate the 3rd.
For example, setting ISO at 100 with Aperture at F4, the camera will calculate the shutter speed.
However, what happens when you only select 1 of the 3? For example, you set to Aperture mode at F4 but ISO AUTO, what base does the camera use to know what the optimum shutter speed to use and what ISO to set? I mean, it can choose from anything from ISO100-6400, from any shutter speed in any combination how does it know what the "OPTIMUM" 2 settings are? I'm always curious because sometimes i do set to Auto ISO because there's really no time to fiddle with ISO settings
Knowing that the camera uses 3 variables to calculate, ISO,Aperature and Shutter based not he exposure you want.
By choosing any 2 of the 3, the camera will calculate the 3rd.
For example, setting ISO at 100 with Aperture at F4, the camera will calculate the shutter speed.
However, what happens when you only select 1 of the 3? For example, you set to Aperture mode at F4 but ISO AUTO, what base does the camera use to know what the optimum shutter speed to use and what ISO to set? I mean, it can choose from anything from ISO100-6400, from any shutter speed in any combination how does it know what the "OPTIMUM" 2 settings are? I'm always curious because sometimes i do set to Auto ISO because there's really no time to fiddle with ISO settings