Today I started out finishing my promo video for IDTV, then Preston and I had a two hour tutorial with the Cannon 5D. This information is very important for me and can be carried over to the Friday Show. We use the Cannon 3ti, which is a scaled down version of the 5D. Jess does have a 5D so it is nice to know how to use these cameras. Some of the things I learned was what an F-Stop is, shutter speed, and ISO. All of these things are ways you can control light in your camera.
The F-Stop is the lens iris, and the larger the F-Stop the smaller the iris is. And the larger the F-Stop the less amount of light is let into the camera. In photography the F-Stop is called the aperture but they are basically the same thing.
The stutter speed is the time the shutter is open to allow light to hit the sensor. It is measured as a fraction for example of a second. The shutter is open for that amount of time, and lets light enter for that amount of time. When you have a lot of light you want to keep you shutter speed faster, and when you don’t have a lot of light you want to keep your shutter speed slower. The shutter controls the amount of time light enters the camera.
The ISO is how sensitive the sensor is to light. When you have a lower ISO the picture is better quality but requires a lot more light. When the ISO is larger it will take less light to form a picture but looses quality. Each time you double the ISO the camera only needs half the amount of light to form a picture. However you could say the ISO setting is how sensitive the sensor is, but what you are actually doing is amplifying the light values your camera is set to capture. This is why the quality of the image goes down as you increase the ISO. You don’t actually capture more light in the sensor, but double the amount of light you do have. (Kind of complicated)
These are three completely different ways to control light in your camera and understanding all of them will optimize your video quality.
The F-Stop is the lens iris, and the larger the F-Stop the smaller the iris is. And the larger the F-Stop the less amount of light is let into the camera. In photography the F-Stop is called the aperture but they are basically the same thing.
The stutter speed is the time the shutter is open to allow light to hit the sensor. It is measured as a fraction for example of a second. The shutter is open for that amount of time, and lets light enter for that amount of time. When you have a lot of light you want to keep you shutter speed faster, and when you don’t have a lot of light you want to keep your shutter speed slower. The shutter controls the amount of time light enters the camera.
The ISO is how sensitive the sensor is to light. When you have a lower ISO the picture is better quality but requires a lot more light. When the ISO is larger it will take less light to form a picture but looses quality. Each time you double the ISO the camera only needs half the amount of light to form a picture. However you could say the ISO setting is how sensitive the sensor is, but what you are actually doing is amplifying the light values your camera is set to capture. This is why the quality of the image goes down as you increase the ISO. You don’t actually capture more light in the sensor, but double the amount of light you do have. (Kind of complicated)
These are three completely different ways to control light in your camera and understanding all of them will optimize your video quality.