The exposure triangle is made up of ISO, shutter speed and aperture which controls noise/grain, motion blur and depth of field. Instead of only adjusting one of these 3 elements adjusting all of them will help to gain a high quality image that will be more effective to the audience of the shot. Learning to understand the exposure triangle will allow for the capture of an extremely effective image.
Evidence and demonstration of understanding of ISO
The ISO of the camera effects moving image as it affects the sensitivity that the camera has to the light. When using the camera outdoors I used a lower ISO of 200 so that the camera was not as sensitive to the changing ambient lighting and helped to produce a cleaner image. I have shown this in my clip by using a ISO of 200 and a low aperture of 3.5. I feel that the moving image I caught was effective as the image is clear and the light isn't over exposed. One technical difficulty that I experienced was the image being under exposed at ISO 100 so I adjusted the this to be 200 so the cameras sensitivity to light was a bit higher and the image wasn't under exposed. When the ISO is higher the more sensitive the camera is to the light therefore when indoors with low lighting I used a ISO of 1600 so that the camera would be extremely sensitive to the light. However this ISO may mean that the quality of the image can be reduced due to the high ISO stretching the image and creating noise within the image. But it can be 2 'a good tool to help you capture images in dark environments'. When shooting outside at night I decided to compare ISO 200 and ISO 1600 to show the difference the two make which is very clear when looking at the two shots at the church is clearly seen in ISO 1600 where as ISO 200 is more dimmed and harder to make out the church. If i was to redo this I would compare different ISO's outside as well as inside with low light level and try a variety of background with different light sources at night.
Evidence and demonstrating of understanding of Pull focus.
A pull focus is often used when changing the focus while the shot is being recorded often going from one object or subject to another by adjusting between the two. It is often used in TV and Film to emphasis an element of drama taking place such as in James Bond Casino Royale when the pull focus adjusts from James Bonds face to a smashed glass of wine in the foreground. The focus shifts backwards and forwards. In order to get the pull focus to correctly work the camera needs to have a shallow depth of field, which is controlled by the apperture, so that the camera focuses on one subject only rather than everything that makes up the mise-en-secne. When creating my own pull focus I started with the camera focusing in the foreground on an elephant statue and then being moved to focus in the background on a statue of a girl. I feel that my moving image was effective as you can clearly see the pull focus taking place from shifting from the object in the foreground to the object in the background. One technical difficulty I endured was the ISO of the image being too high making the image look more noisy so I adjusted this to make the image look cleaner. If i was too improve my demonstration of a pull focus I would try it at different angles and lighting to see how it works in different levels of light.
Evidence and demonstration of understanding of Aperture
Aperture is extremely important to moving image as it allows to add dimension to the image and can also effect the exposure of the image by making it either brighter or darker. Aperture is similar to the human eye by reacting to light levels in the environment and either shrinks or expands to allow for the right amount of light to enter the camera. The larger the aperture the more light entering the camera and the smaller the aperture the less light entering, so the lighter the envisioned the lower aperture is needed and the darker the environment the higher aperture is needed. The aperture also allows for control of the depth of field withing a moving image. When first experimenting with aperture I used a 135 mm lens with an aperture of F2.8 which allowed for a extremely deep depth of field by completely blurring the background, when re doing this I used a 50mm lens looking at a leaf with an aperture of F2.8 which allowed to focus on the ear and again blur out the background. When changing the aperture too F8 when experimenting you can clearly see that the background is more clearer than the first as you can see the camera lens and make out a table and chair behind which was hard to do so in the original at F2.8. When taking another shot of the leafs i decided to use a normal lens with an aperture of F16 so that all of the depth in the image is captured and the background can clearly be seen. If I was to do this again I would try a wider range of lenses and compare all F2.8, F8 and F16 to truly show the depth of field that the aperture can create.
Aperture F2.8 with 135 mm lens.
Aperture F16 with 135 mm lens.
Aperture F 16 Normal lens.
Aperture 2.8 50 mm lens.
Evidence and demonstration of understanding of Shutter Speed
The shutter speed effects images as it can either add dramatic affect to the image or control the amount of light that enters the camera. The shutter speed is the exact amount of time the shutter is open for which can allow for more or less light to enter the camera, normally the shutter speed is left on 1/50 if no dramatic effect is needed. The shutter speed also controls the amount of motion blur that can be seen in an image the lower the shutter speed the more motion can be seen and the higher the shutter speed the less motion blur can be seen and a more clearer image is produced. However motion blur isn't always bad within moving image as it can represent speed for example when 'taking a shot of a racing car and want to give it a feeling of speed' When experimenting with shutter speed I originally used a panning shot to demonstrate how much motion blur is seen however this didn't completely work properly so I chose to redo the shots involving without the panning shot to fully demonstrate how motion blur occurs and can focus on what exactly is moving instead of moving the camera along with it. I also chose to use water going down a drain instead of moving cars to in order to show how shutter speed affects how the motion of the water is seen.
Shutter speed 1/30
Shutter speed 1\50
Shutter speed 1\250
- 1) Digital Photography school (2018) (online) avaliable from https://digital-photography-school.com (Accessed 1st October 2018) https://digital-photography-school.com/shutter-speed/
- 2) Photography Life (Febuary 2010) (online) avaliable from https://photographylife.com (Accessed 1st Obctober 2018) https://photographylife.com/what-is-iso-in-photography
- 3) Fstoppers (7th June 2015) (online) avaliable from https://fstoppers.com (accesssed 13th November 2018) https://fstoppers.com/education/exposure-triangle-understanding-how-aperture-shutter-speed-and-iso-work-together-72878
- 4) fotosiamo, SLR Lounge, 19th October 2012, How ISO affects your image, (online) available from https://www.slrlounge.com, (Accessed 14th September 2018)
- 5) Media college.com, The Focus Pull, (online) available from https://www.mediacollege.com, (Accessed 14th September 2018)
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