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also a higher apperture means that camera will stay open longer and that means you need a steady hand and pictures will come out blurry if they're shaky.
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Actually that's not quite true. Aperture refers ONLY to the size of the 'hole' that the scene is shot through. The shutter speed determines how long that hole stays open.
The higher the aperture number (or F-stop like F-22 for example) the smaller the hole. So all things being equal if you have a small hole, that hole needs to stay open longer to let enough light in to properly expose the shot. If you are outdoors and there's tons of light, no problem. But if you are indoors, like jiorji said, too small of an aperture will require a tripod because you're hands are normally not steady enough.
Hope that wasn't too confusing,
Marko