Aperture can affect the quality of a photographic image in at least four ways.
First, and most well known, as the aperture (the lens opening -- the hole through which the picture enters the camera) gets larger it lets in more light and you can take a picture in darker locations, or you can take pictures at higher shutter speeds thus freezing movement better.
The next most commonly known effect is that the wider the aperture the shallower the depth of field. That is, the fewer things in front of or behind the subject of the picture are in focus. As the aperture gets smaller things further away from the subject in both directions are clear.
Another way aperture can affect the image is that your lens will be sharpest at some aperture. Often somewhere around F5.6 to F8 your lens will make the sharpest (clearest) images. This is called "the sweet spot."
Finally, for technical reasons, at very small apertures (usually F16, f22 or smaller) an optical phenomenon caller diffraction causes the image to become become less sharp. You can think of it that when light must squeeze through a tiny hole the light rays interfere with each other.
The smaller the aperture, the more light enters the camera and onto the film. Also, the higher the aperture number the better the depth of field.
It obviously doesn't.
help center in on an image
small aperture= short focal range (this means less of the picture will be in focus...sounds like a bad thing but creates more artistic photos with blurry background and sharp subjects) large aperture= long focal range (objects far and close will remain in focus)
It cause a size difference.
Aperture.
No, but it does change whether motion in your photo will blur or not.
The composition rule of thirds affects the quality of a picture by making it more interesting. Using the rule of thirds make it easier to center a photo.
An aperture ring affects the SLR camera because you turn it to adjust light and focus.
The stopping of action affects the quality of a photo because it can catch pictures that the naked eye never could catch.
No, just changes the distance required between the lens and the screen in order to get a good picture. BUT it does not affect image quality.
Depth affects the quality of a picture in a few ways. Depth can make a picture look bland or it can make it look meaningful or artistic. It can be blurry or completely in focus.