This article contains my notes for the IOP course.
- Exposure control
- Each f-stops either halfs or doubles the amount of light.
- Large aperture will give you a background which is out of focus, e.g. f2
- A small aperture will give you a image with everything in focus
- Depth of field
- is influenced by three important factors
- how far away your subject is from your camera lens
- the aperture
- the focal length
- is influenced by three important factors
- Spot metering
- Works by measuring light in only one small spot of the centre of the viewfinder. This cuts out too much light and can lead to more accurate exposure.
- Good if you have a very light or dark background compared to the subject.
- Hand-held exposure meter
- External meter
- Allows you to correctly place the meter, like correctly placing the thermostat in your house.
- The sunny f/16 rule
- Set aperture to f/16
- Set the shutter speed and iso setting to 100.
- Adjust as needed.
- f/16 - sunny
- f/11 - slightly cloudy
- f/8 - cloudy
- f/5.6 - heavy cloud
- f/4 - sunset
- Bracketing
- Taking a few shots with different exposure settings to identify the optimum settings.
- Auto bracketing does this for you automatically, allowing you to choose later on.
- Exposure compensation
- You can set the exposure manually using a technique called exposure compensation.
- You can set the exposure compensation mount up to +/- 2 stop in 1/2 stop increments.