aperture shutter speed and IOS

1. the aperture is related to the pupil
2. the smaller the aperture the larger the f-stop, the higher the aperture the smaller the f-stop.
3. the smaller f-stop or larger aperture will bring out the foreground from the background by making the foreground in focus and the background blurry. the area in focus is the depth of field and that changes with the aperture size, bigger aperture (smaller f-stop), the smaller depth of field. slow shutter speed

fast shutter speed 

1.

a. 1/150

b. 1/160

c. 1/350

d. 1/350

e. 1/250

f. 1/300

a. 1/50

b. 1/50

c. 1/350

d. 1/150

e. 1/100

f. 1/200

2. aperture priority: shutter speed is automatic but aperture is manual

shutter priority: shutter speed is manual and aperture is automatic

manual: both shutter speed and aperture are set automatically 

1. with a higher IOS the shutter speed can be faster

2. when there is lots of light, use the lowest IOS

3. when there is not enough light increase the IOS

aperture settings

2.8, 4, 5.6, 8, 11, 16, 22, 

shutter speed

1, 1/160, 1/4000

IOS

100, 200, 400, 800, 1600, 3200, 6400, 12800, 25600,