FOR
PERFECT EXPOSURE

​

When some appropriate amount of the light
passes through a right opening of the lens,

 

 

When it continues for a certain duration
of the Shutter, 
making a correct impression
on a sensor selected at a particular value
of the sensitivity ISO, and when it creates a
perfect image with the details in both, highlighted and shadowed areas simultaneously, it's called a Perfect Exposure.

​

​

​

​

​

These three have relations with each other, they create a triangle to compensate each other, and when the two of them are known, the third can be found.

​

​

​

Their names are
Aperture, Shutter Speed and ISO.