Shutter & Aperture Priority Modes
Assuming you have the facility on your camera to be able to change either/or the shutter and aperture settings then there are some very creative things you will be able to do next time you are capturing an image.
These two modes are referred to as “Priorities” in that one will have the priority over the other These are often symbolized as Shutter Priority (Tv) (T being for time) & Aperture Priority (Av).
So when would Shutter Priority be the best mode to use ?
If your subject is moving you need to be able to capture the image at a speed that matches the speed of the movement. Some cameras will capture images up to 1/8000 of a second providing there is enough light to do this, allowing the action to be captured sharply at particular point such as with this hockey game.
Or it could be used to blur motion by focusing on a still object often referred to as “long” or “timed” exposure such as her where the model is still and the passers by are blurred by motion this could be at 1/20 of second or longer. For such shots the camera needs to be on tripod.
So when would Aperture Priority be best mode to use?
This is most usually used for best effect for still life, close up shots (macro) or landscapes with high aperture settings of F8 and above to give depth to the image and to artistically blur movement such as water flow on a waterfall as shown here.
It can also be used by keeping the aperture of the lens as wide as possible say F2.8 which is very good for portraiture as this reduces the depth of the image to focus mainly on the eyes which is generally more flattering in this type of image and also helps to remove distracting backgrounds.
So the Av mode will increase or decrease the amount of the image that appears to be in focus or out of focus (The next blog posting will cover this in more detail with Depth of Field)
Shutter Priority (Tv) and Aperture Priority (Av) work hand in hand controlling the amount of light entering your camera. The aperture has to be open or wide for fast shutter shots and is much narrower for slower shutter speeds. These are actually semi-automatic settings and fully automatic settings will pair these up in a way that best works for that preset settings, such as: sports or landscape modes. If you haven’t tried using these different controls on your camera do, you will be surprised at the difference it will make to your image creation.Labels: marcbyram photography photo tips aperture shutter prioirty modes how to use your camera to be creative
So when would Aperture Priority be best mode to use? 
It can also be used by keeping the aperture of the lens as wide as possible say F2.8 which is very good for portraiture as this reduces the depth of the image to focus mainly on the eyes which is generally more flattering in this type of image and also helps to remove distracting backgrounds.
So the Av mode will increase or decrease the amount of the image that appears to be in focus or out of focus (The next blog posting will cover this in more detail with Depth of Field)