Dim interior at ISO 100 — clean but dark
A table by a window in dim evening light, at the lowest ISO.
Camera
Not specified
Lens
Not specified
Focal length
35 mm
Aperture
f/2.8
Shutter speed
1/60 s
ISO
100
Focus
Single-point AF
White balance
Auto
Flash
Not used
Tripod
Not used
Why does this photo look like this?
A low ISO gives the cleanest possible image, but the sensor needs more light. In a dim room the picture comes out dark unless you slow the shutter or open the aperture.
Look at this
The image is smooth with no visible grain — and noticeably dark in the shadows.
What would change with different settings
Raise the ISO to 800 and the same shutter speed gives a usable brightness.
ISO comparison
The same dim indoor scene at three ISO values.
Demo imageDim interior at ISO 100 — clean but dark
Cleanest image, darkest result
1/60 s · f/2.8 · ISO 100
Demo imageDim interior at ISO 800 — bright with a little grain
Bright, slight grain
1/60 s · f/2.8 · ISO 800
Demo imageDim interior at ISO 3200 — bright with visible noise
Bright, clearly visible noise
1/60 s · f/2.8 · ISO 3200
What changed
Only the ISO changed: 100 → 800 → 3200.
What stayed the same
Same scene, same f/2.8, same 1/60 s shutter speed, same dim evening light.
What happens if you change the settings?
1/60 s · f/2.8 · ISO 100
Always check your exposure and adjust settings according to the actual lighting and movement.
These are starting settings, not universal rules.
Always check your exposure and adjust settings according to the actual lighting and movement.