Camera basics – ISO – Aperture – Shutter speed

Shutter Speed

The time the shutter is open to expose light into the sensor.

Typically measured in fractions of a second.

Slow shutter speeds means more light into the sensor

Examples of shutter speeds: 1/15 (1/15th of a second), 1/30, 1/60, 1/125.


How big the hole of  the lens is open.

The larger the hole, the more light.

Aperture also controls the depth of field.

Small aperture = large depth of field

Large  aperture = Small depth of field

Typically expressed in “f” numbers (for “focal ratio”)

Examples of f-numbers are: f/1.4, f/2.0, f/2.8, f/4.0, f/5.6


Artificially brighten your photos

Measured in numbers (no kidding 😉 )

Low number -> dark image

Higher numbers -> brighter image.

Con: as the ISO rises, so does the noise in your images.

Examples of ISO: 100, 200, 400, 800, 1600.