Aperture controls the size of the opening that allows light into the camera, with a smaller aperture letting in less light and a larger aperture allowing more light. Shutter speed determines whether motion is frozen or blurred, with faster shutter speeds freezing action and slower shutter speeds blurring it. ISO measures the camera sensor's light sensitivity, with lower ISO numbers indicating less sensitivity and finer grain but also requiring more light. Higher ISO settings are used in darker situations but result in noisier images.

1. CAMERA MANUAL SETTINGS

2. APERTURE
An opening, such as a hole, gap, or slit.
For example the smaller the hole the less light that will
come in also the bigger the hole the more light that will
come in.

3. SHUTTER SPEED
Shutter Speed is one of the three
pillars of photography, the other
two being ISO and Aperture.
Shutter speed is where the
other side of the magic
happens – it is responsible for
creating dramatic effects by
either freezing action or blurring
motion. In this article, I will try
to explain everything I know
about shutter speed in very
simple language.

4. ISO
ISO measures the sensitivity of the image sensor. The same
principles apply as in film photography – the lower the
number the less sensitive your camera is to light and the
finer the grain.
Higher ISO settings are generally used in darker situations
to get faster shutter speeds. For example an indoor
sports event when you want to freeze the action in lower
light. However the higher the ISO you choose the noisier
shots you will get. I’ll illustrate this below with two
enlargements of shots that I just took – the one on the left
is taken at 100 ISO and the one of the right at 3200 ISO
(click to enlarge to see the full effect).

5. MY OWN PHOTOGRAPHS