The simplest explanation for noise is: Think about what happens when you turn up the volume on your stereo, the sounds goes from nice, hearing all the instruments in the band to loud and with some of the instruments getting drowned out or the music is distorted. The same with the DSLR’s sensor, once you start turning things up, away from normal to loud (low light and high ISO) the image starts to degrade a bit. Until they invent something better than the sensor and amplifier to collect our images we will have to deal with this gain by using our noise reduction setting and/or keeping things normal as possible. Me, like my music I like my images loud but not too noisy.
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The most frequently quoted rule of composition is of use of thirds. Imagine your picture being divided equally into nine rectangles, three across by three up. The main features of your image should be placed not in the center of the frame, but on this dividing lines. Ideally the subject of the picture should be located on the intersection between two of these thirds. The use of thirds is very much guide - anywhere between thirds is and quarters is just as good. Though useful, this does not always have to be applied. For example, a close up picture the main feature could be placed in the centre.
written by: John Ellis DIGITAL PHOTOGRAPHY
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