Have you ever taken a picture and been disappointed after that not everything you in focus was in focus? Probably that was because of using the wrong aperture on your lens and having too shallow of depth-of-field.
Depth-of-field, a term only used in the photography field. Basically it refers to the area from before you’re subject to behind your subject that is all in focus. Typically depth-of-field is controlled by the lens aperture, or opening that allows light into the sensor to take your picture.
Aperture settings are called f/stops and can begin at f/1.5 for a really wide opening and go down to f/32 for a very small opening. There are other f/stops in between the widest and smallest on your lens and with each f/stop the area of depth-of-field changes. The way this works is that the wider the opening, (lower f/number), the shallower the depth-of-field. Also the smaller the opening, (larger f/number), the greater depth-of-field you will have.
Looking at the examples, notice that my focus was on the center of the flower and with each f/stop change the areas of focus changes. The biggest noticeable change is on the front petal and the rear petals.
I hope this has helped you get a greater understanding of how depth-of-field (focus) can be controlled to get the picture you envisioned.
Please posted any comments or questions in the Comment section below.
P.S. To learn more about how the aperture works to effect your exposure I recommend a book called “Understanding Exposure” by Bryan Peterson and you can check it out by clicking on the Amazon link to the right of this article.