Use of Exposure Control for Effect

PROS AND CONS OF MOVING IMAGE CAMERA AND ITS EXPOSURE

In this blog post I am going to describe how to use a camera, specifically a Canon brand. When taking these pictures I operated a DSLR camera on a Canon EOS 70D/1300 using Aperture, Shutter Speed and IOS to control the lighting that went through the camera. 

Aperture is used to control the amount of light reaching the film or image sensor. In combination with variation of shutter speed, the aperture size will regulate the film's or image sensor's degree of exposure to light. To use my aperture is set the mode to “Aperture Priority“. Set your lens aperture on your camera to the lowest possible number the lens will allow, such as f/1.4 if you have a fast lens or f/3.5 on slower lenses.                                                                                      Shutter speed is responsible for two particular things: changing the brightness of your photo, and creating dramatic effects by either freezing action or motion blur. This what happens when it is adjusted. It is the length of time your camera shutter is open, exposing light onto the camera sensor. Essentially, it’s how long your camera spends taking a photo. When you use a long shutter speed, you end up exposing your sensor for a significant period of time.                                                                                                              Depth of Field refers to the range of distance that appears acceptably sharp. It varies depending on camera type, aperture and focusing distance, although print size and viewing distance can also influence our perception of depth of field.

Whilst filming a moving image I had noticed some pros and cons when using the camera but aiming our attention on the Focus Pull.

 Using the Canon DSLR we begun filming a moving image from 0:07 seconds where we created as a group a scene where we have illustrated a girl walking down an empty stairway and walks a guy and passes a card to him. The whole moving image had successfully created enigmas as to what the situation is between the two performers. The footage was also very high quality and had shot in 1080p, which is very high quality HD. 

 We used an extreme close up of the girls shoes walking down the stairs as it dismisses the characters identity and creates mystery. At 0:14 seconds the camera is positioned behind the performer so that we do not reveal her characters identity. The focus of the image is blurred at 0:16 seconds and then gradually becomes focused at 0:19 seconds when the girl begins to pass over her credit card to the mysterious boy. Then in the next scene there is a close up shot of the card getting passed over which is begun in a blurred focus but for a split second gains full focus and then blurs the object again. This is really effective as it allows the object to be visible to the audience for a second making it seem discreet.  

Between 0:01 and 0:07 seconds the complete image is blurred  where we can only visually see an outline of a persons body. We cannot view the location of where the camera is filming. Toward the end, a man holding a camera is seen in clear focus facing towards the shot as if it is almost a mirror he is facing and the image is reflecting back, but when filming the shot that was not the case of how it was filmed. There was no mirror involved and someone else was filming the shot. This has a very film look and imitates a look of a film very well due to the quality and is not pixelated.

 

 In the second moving image, the clip reveals a man standing behind a young girl and watches her without her acknowledgement. At this point the camera is only in focus on the girl but later at 0:33 seconds, the man behind her is in focus. This makes the situation seem that the man is stalking her. These camera effects are very effective to use as it makes the audience avert their attention between characters and objects by using focus pull. 

However, a disadvantage to using focus pull is not getting the timings right or completely getting a clear image of the person as it is still a little blurred. At 0:04 seconds it takes a long time for the focus pull to focus on the person and adjust. 

It is also quite difficult to control the IOS, aperture and shutter speed according to the effect that natural lighting has on the camera. The focus pull needed to be visible in the lighting and that meant that the aperture and shutter speed needed to be on the correct settings.