Use your aperture to get what you want. Adjusting your aperture settings to a large aperture (smaller number) will create a shallow depth of field and everything behind your focus will be blurry. Another option is to have a small aperture (large number) to make everything in your photo in focus.
Notice how the hair strands are in focus but we eyes are not. With a large aperture (this was 1.8) subjects even inches away can be separated by being blurry and focused.
7:30 a.m. October 9th. Nikon 5200. ISO 100 F1.8 1/10 sec.
The same principle applies in this photo with a large aperture and shallow depth of field.
See the difference?
Yellow Woods, October 9th. 7:15a.m. Nikon 5200 55mm. ISO 100 F16 27 sec. W/tripod
Yellow Woods 2, October 9th. 7:15a.m. ISO 100 F1.8 7/10 sec.
The two photos above were taken in the same location with different aperture settings. Photo number one had a small aperture, F22, while the one below had a large aperture, F1.8.
Solitude, October 9th. 7:30a.m. Nikon 5200 35mm, ISO 100 F16 1/4 W/tripod
Solitude 2, October 9th. 7:30a.m. Nikon 5200 35mm, ISO 100 F1.8 1/350
The difference in the two photos above is slight but very important. Notice the bushes and trees in the background. With a narrow depth of field int he first photo, F16, the background is in focus. In the second photo, only the grass in the foreground stays in focus because of the shallow depth of field with F1.8.
Control your aperture and get the effect you want in your photo by using a shallow or narrow depth of field. It will make the world of a difference in your work.