If I set my f-stop to f1.8 and my shutter speed to 1/125th of a second and my ISO is maxed at 6400, yet my image is coming out dark. What is the problem and what can I do? Why?
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If your image is coming out dark you need to increase the exposure. You can do this in 3 ways:
- Allow more light to enter the lens - You state that your aperture is set to f1.8, I will assume that this is the maximum aperture, so we will move on.
- Record more of the light hitting the sensor - You state that you are already at the highest ISO setting for your camera, again we will move on.
- Increase the time the sensor is exposed to light - Increasing the shutter speed will allow for more light to hit the sensor, resulting in a brighter image.
The other option is to add more light to the scene, for example by using flash, but this would be out of the scope of a question about "Exposure triangle".
What is the problem and what can I do?
Whenever you have too dark image:
- decrease F number
- increase exposure time
- increase your ISO number
- use flash
or use automatic exposure mode (A, P, S or auto) instead.
If you cannot record image of well lit scene in automatic exposure mode or camera sets too unusual settings compared to other cameras you might have a problem with your equipment. Let me know if it is the case.