Understanding F/stop and aperture is essential if you want to get the most out of your SLR camera so bear with me as I will try to explain it to you in the simplest way I possibly can.
First you will have to remember that the lower F/stop is, for example 1.2/f the more light will get through the lens onto the sensor therefore allowing you to photograph in lower light, and higher f/stop for example 4.5/f will allow less light to get through the lens. I know… that sounds pretty confusing
-Why lower number means more light and higher less? Let me explain.
F/stop is a ratio between the diameter of the aperture and the lens focal length. So for example on 50mm Lens f/2 says that aperture diameter is 25mm (50mm/2=25mm) and f/4 would say that is is 12.5 mm (50mm/4=12.5mm) now imagine that aperture is a window through which light gets onto a sensor. Which door will allow more light 25wide big or 12.5 mm wide?
So F stands for? F stands for Focal length which is measured in millimeters (mm)
And Stop is because each number is a STOP in doubling/halving sequence
f/1.4 f/2.0 f/2.8 f/4 f/5.6 f/8 f/11 f/16 f/22
Aperture
As always I hope that I gave you enough information to inspire you to learn more, experiment and have fun with photography.
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