Aperture - it's not just a Product

I was watching GMA in bed this morning (I've been sick), and a photographer came on. He talked about holiday photos and getting great shots. One key point he mentioned was "know your camera".

I struggled with this initially (years ago) - I'm not technical, and those details aren't really all that interesting to me. However, for the sake of my photography, I really did need to understand several key concepts. Therefore, I will be discussing the following over the next few days:

1) Aperture

2) Shutter speed

3) ISO

4) White balance

If you know how to adjust these on your camera (whether it be point-and-shoot, or otherwise), then you'll be in good shape.

I'll start with Aperture. A technical definition for it is "the diameter of the lens opening. The larger the diameter of the aperture, the more light reaches the film / image sensor. Aperture is expressed as F-stop, e.g. F2.8 or f/2.8. The smaller the F-stop number (or f/value), the larger the lens opening (aperture)."

Huh? I'm sure my engineering-educated customers could jump in and help us, but for the rest of us:

The smaller the aperture, the higher the F-stop. In English, this means that your picture will have more elements that are sharp and clear. Example:



This is a relatively high F-stop - around 10 and 11, respectively. I chose this picture to 1) Keep my mind off of this cold weather and 2) Because of the leaves. You'll notice that all of the elements are in equal focus, regardless of the distance. Compare this with other equally colorful pictures:



Notice that the butterfly and its surrounding flowers are in sharp focus. Everything else (especially the leaves) is strategically blurred. This is a relatively low F-stop of 2.8. The same points are valid for the second picture - the left side is in focus, to draw attention to the colorful details. The right side is blurred.

Some of your point-and-shoots give you the ability to adjust your aperture settings. You might not be able to by much, but even the smallest bit can make a difference for you. If you can, you'll want to take the same picture using different settings. This way, YOU can see the difference - and you won't have to just take my word for it. :)

So, to summarize - the higher the F-stop number on your camera, the more focused objects in your pictures.

Till tomorrow!