In the article it is said that there is three factors that affect the depth of field. The first one is lens aperture; if you want the main focus on one small part, make the aperture (f-stop) as wide as possible or if you want a wider depth of field, with as much in focus as possible, set as small aperture as the light allows you to. In both cases you have to change the shutter speed to compensate In the article you can learn more about the aperture values and about the hyperfocal distance. "The hyperfocal distance is basically a point in which you focus and everything from that point to infinity will be sharp." This is most successfully used in landscape pictures.
From another websites I got this examples on the different aperture values. I thought it would be easier to understand the value if you see the changes in similar pictures. The following pictures is from this website (uhm, it's in swedish...)
The other factor in working with the depth of field is the distance between the subject and the camera. The shorter the focal distance, the less depth of field. So if i refer to the lego men in the pictures above. If the red and white guy would be closer to Chris in the middle, it would be more focus on them than if they both were further away from him. In the first article you can read more about the relationship between f-stop and the lens that you have.
The last thing to control is the lens focal lenght. This is also very hard since you can't maintain the composition that you wanted.
My own example of a picture with a shallow depth the field. This doesn't have that extreme shallow buuut, I like it :)
No comments:
Post a Comment