f.81/125

f.81/250

f.81/30

*the number of shutter speed start from B ( manual shutter using) to ---- 1/5000 sec

f.2.81/400

f.41/500 f.2.8

1/500

*there is an a relashenship between sutter speed and Aperture and this called EV

we use shutter speed number to cash a speed shoots .. like here

f.221/2 f.22

1/4

*In this case we use Aperture like 16-22-32 , As , if lights take a lot of time the photo will be over expouser

Her we us an other case of shoots .. the camera slow shutter and th object is fixed

*Deepth of filed depend on Aperture so, if you want to small deepth of file use low shutter speed and hight f.stop number

Exposure Value (EV)... indebended on shutter speed and Aperture .

If your meter read f/1.4 .. 1/1000 then you can use f/22 ... 1/4 and you will get same resulet but the defrance will be in deepth of filed

shutter speed Aperture

1/10001/5001/2501/1251/601/301/151/81/4

f/1.4f/2f/2.8f/4f/5.6f/8f/11f/16f/22

f.2.81/125

f.161/125