F-Stop Changes in Snow

The F-stop, or aperture setting, of a camera controls how large or small the hole is that the light passes through. This also affects the depth of field in the image.

Here is a set of examples taken on a snowy day in January. The camera is my Canon S-100 mounted on a tripod. It was in the same spot, with the same lighting, and the camera was on aperture priority. So with each shot I solely changed the aperture setting, and the camera then adjusted the shutter speed and ISO sensitivity to match that wider or smaller hole.

F8 - f-stop changes in snow
F-8

F 7.1 - f-stop changes in snow
F-7.1

F 6.3- f-stop changes in snow
F-6.3

F 5.6- f-stop changes in snow
F-5.6

F 5.0- f-stop changes in snow
F-5.0

F 4.5- f-stop changes in snow
F-4.5

F 4.0- f-stop changes in snow
F-4.0

F 3.5- f-stop changes in snow
F-3.5

F 3.2- f-stop changes in snow
F-3.2

F 2.8- f-stop changes in snow
F-2.8

F 2.5- f-stop changes in snow
F-2.5

F 2.2- f-stop changes in snow
F-2.2

F 2.0- f-stop changes in snow
F-2.0

So the differences are fairly subtle. If you put the F8 and the F2 side by side, you can see slight differences in the image.

F 2.0- f-stop changes in snow F 8- f-stop changes in snow

This is the full range of what I can do with f-stop at "no zoom" on this camera. Note if I do zoom out to 5.0x, that I can only do F8, F7.1, and F6.3. I cannot do any smaller numbers.

5x zoom F 8- f-stop changes in snow
5x zoom at F-8

5x zoom F 7.1- f-stop changes in snow
5x zoom at F-7.1

5x zoom F 6.3- f-stop changes in snow
5x zoom at F-6.3

F-Stop in Digital Photography

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