My articles about using the Canon Powershot SX10IS are not likely to proceed in logical order from simplest to most complex, rather they will just show up as I discover and use the features.
I was trying to take pictures of some of my houseplants this week. On the automatic setting the camera insisted on flash, and the shot below shows how the light bounced off the "Desert Rose," creating a hot spot that I don't like.
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So I decided to switch the camera to Manual and see how difficult it would be to increase the "film speed." The larger the ISO number, the less light is required to take a good picture. In film developing ISO (formerly ASA) referred to the film's sensitivity to light. So for film with a high ISO you could keep the shutter open a shorter length of time. In digital technology the terminology has been retained and an arbitrary relationship between the exposure and sensor data has been created so people with long familiarity to film to not need to rethink the entire photographic process.
Therefore, since the plants were in rather low light, I wanted to increase the ISO so that I would not need to use the flash. Here is the result of changing the ISO to 1600, the highest regular setting allowed on this camera. Now, I've eliminated the hot spot, but overall the shot is a bit dark. (Supposedly there is a way to get the ISO to 3200 for special situations, but I haven't figured that out yet.)
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Below is the final result after I had lightened the shot a bit with photo software. Overall it is a bit dark and dramatic, but I eliminated the hot spot caused by the flash and I am satisfied.
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See Canon Power Shot SX10IS - Out of the Box
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