The Effect of Aperture on Depth of Field

This is a shot at f/2.8 showing a subject walking into focus.
Process: To create this shot, I used a lens that has it's lowest F stop at f/2.8 in order to create a shallow Depth of Field. I also used a fairly high shutter speed to clearly define the movements.
Problem Solving: The main problem I had when Filming this shot was getting the focus on the subject right. To solve this problem, I got the subject to stand in front of the camera to make sure he was in focus, then got him to move back to make sure he was out of focus when further back. After a couple of trial runs, we managed to perfect the shot.
Justification: I chose to shoot in this location as it was in college so it was available for me. I also wanted to experiment with depth of field in a less conventional way.
Recommendations: If I shot this footage again, I would make it so that when the subject comes into focus, it is clearer and there is more definition between him and the background.


This is shot at f/2.8 and clearly shows the definition between the subject and the background, as he is much more in focus than the background.
Process: To create the above shot, I used the same lens I had used to create the first shot which had the lowest f stop.
Problem Solving: The only real problem I faced when filming this shot was getting the exposure right and this was easily solved by increasing the ISO and also increasing the shutter speed.
Justification: I shot this in a location where the background was far enough away from my subject that you could clearly see the difference in focus between the subject and the background.
Recommendations: If I were to re-shoot this shot, I would make sure it is not over-exposed, as this shot is slightly too bright.


This is a shot at f/8 and has less definition between the subject and the background
Process: For this shot I used the standard kit lens that came with my camera, and set the aperture to f/8, a fairly low f stop.
Problem Solving: The main problem I had when creating this shot was making sure the background was slightly less focused than the subject, as sometimes the focus was a little bit off. This was fixed by altering the focus slightly.
Justification: I chose to shoot this in the same place as the previous shot, however I filmed it at a different angle, as the previous angle would not have clearly shown the difference in focus between the subject and the background.
Recommendations: If I were to re-shoot this shot, I would try and get a more sideways angle to clearly show the difference in focus.


This is shot at f/22 and all of the frame is in focus, so there is no difference in definition between the subject and the background.
Process: For this shot I also used a standard kit lens in order to get a fairly high aperture of f/22 to create deep focus.
Problem Solving: The main problem I encountered was getting the exposure right, as with a high aperture less light is allowed to enter the frame so I had to use a low shutter speed to counter this.
Justification: I shot this at this angle in order to clearly show how there is no difference in focus between the subject and the background.
Recommendations: If I chose to shoot this again I would try to frame the shot better to get a more straight on view of the subject.