Exposure Triangle: BSA 101 (Intro to Film) Week 2
BSA 101 (Intro to Film) Week 2
This week we finally got a chance to try out some of the equipment available, specifically the cameras and tripods.
We also learned a bit about the Exposure Triangle - Which is a common way to visualize how the three main variables of photography affect the exposure of an image:
If one of these three changes, the others do so also. Essentially it's a juggling act that the photographer has to perform in order to get the right results.
Shutter Speed is how long the sensor is exposed to the light, this also determines how blurry the image will be, faster shutter speeds will result in sharper images. A fast shutter speed (1/250, 1/125) means less light, a slow shutter speed (1/2, 1) means more light.
Aperture is how wide the lens is open, determining how much light falls on the sensor. Changing aperture also changes your depth of field (the focus). A large aperture (f22, f32) means less light, a small aperture (f1.4, f2) means more light.
ISO is the sensitivity level of the sensor. A higher ISO results in higher quality images, whereas a low ISO can produce grain. A low ISO (100, 200) means less light, a high ISO (1600, 3200) means more light.
To maintain a certain exposure you have to keep all three in balance, if you change your aperture for example, in order to create a more shallow depth of field, you would also have to decrease the ISO and Shutter Speed in reaction to the increased amount of light coming in through the difference in aperture size.
This week we finally got a chance to try out some of the equipment available, specifically the cameras and tripods.
We also learned a bit about the Exposure Triangle - Which is a common way to visualize how the three main variables of photography affect the exposure of an image:
If one of these three changes, the others do so also. Essentially it's a juggling act that the photographer has to perform in order to get the right results.
Shutter Speed is how long the sensor is exposed to the light, this also determines how blurry the image will be, faster shutter speeds will result in sharper images. A fast shutter speed (1/250, 1/125) means less light, a slow shutter speed (1/2, 1) means more light.
Aperture is how wide the lens is open, determining how much light falls on the sensor. Changing aperture also changes your depth of field (the focus). A large aperture (f22, f32) means less light, a small aperture (f1.4, f2) means more light.
ISO is the sensitivity level of the sensor. A higher ISO results in higher quality images, whereas a low ISO can produce grain. A low ISO (100, 200) means less light, a high ISO (1600, 3200) means more light.
To maintain a certain exposure you have to keep all three in balance, if you change your aperture for example, in order to create a more shallow depth of field, you would also have to decrease the ISO and Shutter Speed in reaction to the increased amount of light coming in through the difference in aperture size.
Thanks, Bo!
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