Thursday, August 16, 2012

FREEZE MOVEMENT WITH SHUTTER PRIORITY

Posted at 12:56 AM by Unknown
If you've started to learn the manual exposure settings are available in the camera. Now it's time to play around with the settings there. In this article we will discuss how to freeze the motion using shutter priority mode.

Just refreshing, as has been previously written shutter speed is the magnitude of how long the sensor to see the light (aka exposure) - read back of the shutter speed and shutter priority. Broadly speaking speed up or slow down the shutter speed produces a different picture. There is no right and no wrong, it all depends on the message that we want. Super fast shutter speed allows you to freeze the movement of birds flying, slow shutter speed allows you to generate images showing the movement of panning (see tips on photographing panning).

Well let's get started:
For Super Fast Movement
The faster you want to freeze motion in the picture, the faster the shutter speed is needed. In the example image above, the selected shutter speed is very fast which is equal to 1/5000 sec. Shutter speed as fast as it takes for the movement of the surfer is extremely fast, while I was on that boat also moved closer, so both the object and the camera is moving relative to each other. For that camera set on shutter priority mode and auto ISO, and focus on continuous position (see here autofocus mode). I set the shutter speed in the first position of 1/5000 so that the camera choose the aperture of f/2.8.

How to movements that are not as extreme as that?
This photo shows people who were jogging in the morning quite sunny. Photographers just need a shutter speed is (1/400 sec) and that was enough to freeze a movement. Why not have as fast as the previous example? because the relative movement of people jogging slower than surfing, plus a stop for photographers as well as areas of the object (person running) is relatively parallel to the focal plane of the camera (do not move close as smoothly as an example).


This picture requires a shutter speed of 1/800 sec. I was in a stationary position and a flying bird was trying to slow the movement, but the distance of my birds are close enough (about 6 feet) so I need a shutter speed of 1/800 sec.

There is no official benchmark how shutter speed is needed for any situation where we want to freeze motion. Clearly you have to direct the practice, but there are some points that can be drawn from the three examples above.

Conclusions
To freeze the motion you need to consider several things:
- The speed of the object itself, the faster the object the faster shutter speed is needed
- Relative speed we (photographers) to the object. If we move closer then the shutter speed required is also higher
- Distance of the object. The closer the object with the photographer's shutter speed required is also higher
- Focal length of your lens. The longer the focal lens of the faster your shutter speed is needed.

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