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Try to keep your shutter speed 1/90 - 1/125 or faster for landscapes to get crisp images, anything less than 1/60 and you will need to use a tripod to eliminate camera shake. For some people even 1/60 may be too slow to eliminate camera shake. The longer the focal length of the
lens the more noticeable camera shake will be.
If you wish to obtain a blur effect to running water, stream or waterfall to a photograph to illustrate movement then a slow shutter speed is needed. Depending on the amount of flow, 1/15 - 5 seconds is usually sufficient. To do this successfully it is necessary to use a tripod
to eliminate camera shake. In addition to this it is advisable to use a shutter release remote if you have one. Another way round this is to set the camera off by timer, as most cameras support this function. either way this will minimise the risk of camera shake.
If you wish to obtain a crisp image of a moving object then you will need a fast shutter speed of at least 1/250 or higher.
The f-numbers will depend on your lens but most will go from f4-f22 some lenses will go to a higher (i.e. f32 smaller) or lower (i.e. f1.8 larger) aperture. More expensive zoom lenses (usually prime/professional lenses) will have a constant aperture throughout their focal
length, where as cheaper lenses usual have an aperture range (typically f-4 - f-5.6)
Much of this will also depend on your camera, more modern cameras offer many features as well as better light metering, and auto/manual focus, giving you the choice to be more creative. Opinions vary considerably as to best method/practice. Practice almost makes perfect.
No one can get it right every time all the time. (in my opinion) Photography is a way of life every time is different and you never stop learning.
Note:
When using a telephoto or telephoto zoom lens a shutter speed equal or higher to the focal length is required for hand held photography.
For example when using a 200mm lens a shutter speed of at least 1/200 is required to reduce the chance of getting blurred images from camera shake.
See shutter speed explained in pictures |