Exposure triangle

When taking a picture there are a few things that can affect the image one of them is the triangle of exposure. 3 things affect the exposure, Iso, Aperture (f-stop) and shutter speed. These 3 settings can be changed to alter the exposure whilst taking a picture.

This is a normal image of the phone with all the exposure aspects perfect for the conditions, its a good colour, you can clearly see what it is, it isn't too dark or too bright. The shutter speed was on 1/100, so it wasn't open for long, the Fstop (aperture) was 5.0 and the ISO was 800

I then altered the ISO on each image but I kept the Fstop at 5.6 for each image and the shutter speed at 1/60. I set them at this because I took a picture on automatic mode to see what settings I would need so you could tell the difference between the Images

 100 ISO

 200 ISO

400ISO

800ISO

1600 ISO

As you can see the higher the ISO the more exposed the image becomes. It starts off quite dark on 100 ISO then on 1600 it looks over exposed/ too bright.

I then set up the Fstop at 5.6 and kept the ISO at 400, the one I changed this time was the shutter speed.

 1/10

 1/20

 1/40

 1/60

 1/80

 1/100

 1/160

 1/200

 1/250

 1/320

 1/400

 1/500

 1/640

 1/800

 1/1000

 1/1250

 As you can see the shorter the time the shutter is open the darker the image becomes. This is because the shutter is open for less time so less light can get through the lens, the longer it is open the more light goes into the lens so it becomes more exposed where ass the shorter time its open the less exposed it becomes.


After doing the ISO then the shutter speed I have now done the aperture (f-stop) I kept the shutter speed on 1/60 and the ISO on 400 for all these Images

 4.0

 5.0

 6.3

 8.0

 9.0

 11

 14

 16

 20

25

As you can see the higher the F-stop the darker the image becomes, so when it is quite a bright day its better to keep the F-stop quite high but if its a dark day, if you were indoors or it was overcast you should keep the F-stop low but not too low that it becomes over exposed 

So overall these 3 settings affect the exposure when taking a picture, so it can be a lot to mess with when taking a picture but if you get them right then your photograph will look very crisp and clear.