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That's telling the camera to open the aperture a set amount and automatically adjusting everything else for you.
Lower f/ stop, bigger aperture, more light.
That's all I knew.
Bigger aperture also means a shallower depth of field. I didn't know what that meant.
So I set up the tripod, told the camera to track the wrought iron column for focus and took four pics. Two zoomed in, two zoomed out with each at the opposite end of the aperture range.
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| f/6.3, 1/250", ISO 100 |
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| f/40.0, 1/80", ISO 1600 |
The effect is much less pronounced with the lens zoomed out.
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| f/3.5, 1/1000", ISO 100 |
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| f/22.0, 1/60", ISO 250 |
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