Niew Seen Ying (0317961)
Introduction to Photography
Exercise 2: Aperture
Lecture
During the previous lecture, we were told to bring a camera with a manual mode and a tripod. Mr. Vinod shared some of the links and videos regarding to an aperture. I did browse through some of the links and watched the video he posted on the post and slightly understood what is an aperture.
Mr. Vinod explained what is an aperture and what is the effect of it on the quality of a picture. Besides that, he also told us how the aperture works.
Aperture refers to the opening of a lens's diaphragm through which light passes.
Aperture:
-Controls the amount of light entering the lens.
-Controls depth of field in your camera.
A lens typically has a set of marked "f-stops" (Focal length). The lower the f/stop, the larger the opening in the lens, the less depth of field, the blurrier the background.
The higher the f/stop, the smaller the opening in the lens, the greater the depth of field,the sharper the background.
The f/stop also affects shutter speed. Using a low f/stop means more light is entering the lens and therefore the shutter doesn't need to stay open as long to make a correct exposure which translates into a faster shutter speed. Again, the reverse is true: using a high f/stop means that less light is entering the lens and therefore shutter will need to stay open a little longer which translates into a slower speed.
Instructions
Exercise 2a
1. Set the cameras on tripods to get a shot of the railings.
2. Once we decided our frame on the railings, do not change the position of the camera.
3. Keep the ISO at 200.
4. Set our aperture to the lowest f-number. ( f 5.6, f 8, f 11,...)
5. Take a picture of your repetitive subject starting with the exposure meter of 0 with a the right combination of shutter speed and aperture.
6. Do not change the shutter settings as the aperture is increased.
F 5.0 | S1/1000 | ISO 200
F 5.6 | S1/1000| ISO 200
F 8.0 | S1/1000 | ISO 200
\
F 11.0 | S1/1000 | ISO 200
F 16.0 | S1/1000 | ISO 200
F 22.0 | S1/1000 |
ISO 200
Reflection
Through this exercise, I realize that the aperture affects the exposure of the pictures. As above, the pictures is gradually getting darker as the aperture gets smaller. This shows that the amount of light entering the lens is controled by the aperture.
Exercise 2b
1. Take a picture of your repetitive subject starting with the right exposure combination of shutter speed and aperture.
2. Start your aperture setting from the lowest number (f5.6/f8.0/f11.0)
3. Compensate the increase of your aperture with your shutter settings as the aperture is increased to maintain the light exposure at 0.
4. Maintain the ISO at 200.
F 5.0 | S1/1000 |
ISO 200
F 5.6 | S1/800 | ISO 200
F8.0 | S1/500 |
ISO200
F 11.0 | S1/200 |
ISO 200
F 16.0 | S 1/160 |
ISO 200
F 22.0 | S1/60 |
ISO 200
Reflection
Through this exercise, I learned how to control the aperture and shutter speed of the camera to get the right exposure.When the aperture gets smaller, the depth of field of the picture increases, thus the background of the pictures are sharper. Besides, this makes me realize how the aperture settings and shutter speed affects the quality of a picture. The aperture not only affects the shutter speed and the amount of light entering the lens. It also contols the clarity of a picture.
General Feedback: Mr. Vinod told us that all of us have some slight mistakes in our e-portfolio. We need to be more precise on our explanation and reflection. This will help us during our career life.
Specific Feedback: Overall my work was accurate. I have some typing error on two of my photos which make the details of the pictures inaccurate. Mr. Vinod told me that the clarity and the depth of field is the same. He also said that i can be more specific while writing the observations and reflections of each exercise.
Screenshot
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