Saturday, December 12, 2009

First Week with a DSLR: Part 6

Experiment Results (Part 2)
Read about the experiment here.

I took these pictures of our mixer with our  Nikon D40 and  Nikon 35mm f/1.8 DX Lens. I used the mixer so I could get some consistent movement to provide a good example, not because these are compelling pictures. I did the whole experiment, but I'm only showing you three examples-the two extremes, and one in the middle.

In these pictures, we can see something similar to what I talked about in Part 1 of the results. If you look at the lights on our Christmas tree in the background, you can notice the difference in blurriness when comparing the pictures. As I said last time, this is a result of the changing aperture (the number next to the "f" in your viewfinder.)

Obviously, there is something else happening in these pictures because of the movement. As the settings change, the spinning hook looks substantially different. This is a result of the shutter speed (the changing number not next to the "f".) Here is the hook close up:

So what can we learn here? If there is something moving in your picture, you can change the way it looks by controlling your shutter speed. If you want to "freeze" the action, use a larger number, if you want a motion blur, use a smaller number. But that's not all that happens. Tomorrow, we'll consider another way shutter speed affects out pictures.