The Exposer Triangle, The Kelvin Scale Refresher-

This is the Exposer Triangle, this is more relevant to photography but can be somewhat used in videography. The three sides to the triangle are Shutterspeed(motion blur), Aperture/Iris, and ISO/gain.

Shutter Speed is the length of time light is allowed to hit the sensor which is measured in seconds. The slower the shutter speed the more blur is created on the subject. This image shows the difference between having faster and slower shutter speeds. 

Aperture referred to the size of the circular hole in the camera lens which lets in light, if the hole is bigger the more light reaches the sensor, if the hole is smaller you get less light hitting the sensor. Aperture is measured in f-stop. F-stop is a ratio that relates to the size of the opening, f-stop= the focal length divided by the diameter. A shallow depth of field is a wide aperture, the larger depth of field the narrower the aperture. 

ISO/gain is about light sensitivity, if you have a high sensitivity on an image then you get more grain on your image, you should only do this if you are filming at night with low light. If you have a lower sensitivity then you have a clearer image because there is less noise/grain.

Most of the information in this session was a refresher from what I had learned at college doing creative media production. However, it will still interesting to learn more about the settings on the cameras and it was good using a camera again after not using one because of lockdown.

Kelvin Scale/Colour Temperature-

Colour temperature is measured in Kelvins. The Kelvin scale is the range of colour temperatures that we get from different light sources. These have a colour temperature of 3000 degrees and Sun daylight (noon) is the most common; this is usually 5600 degrees. When using the camera, you change between the different colour temperatures.

To get your camera white balanced there is AWB (auto white balance) or you can do it manually. To do it manually, you need to face your camera to something white so that white fills the whole screen, then push the WB button on the front of the camera, it will recognise this as white at just. If you go from inside to outside (or vice-versa) you need to go on another setting (A or B) and redo the white balance as there is a change of light.

ND filters are like sunglasses for your camera, they make the whole image darker and block some of the light coming in. These are used to help with exposure if the image is too bright.

Most of the information in this session was a refresher from what I had learned at college doing creative media production. However, it will still interesting to learn more about the settings on the cameras and it was good using a camera again after not using one because of lockdown. It was also good to have a reminder about the Kelvin scale because I couldn't remember the different numbers for each statistic.