What issues are there with auto-exposure?
If you are shooting outside with auto-exposure on, the iris of the camcorder will open up but if a person passes a window, the iris will detect the daylight and close down so the subject will appear in silhouette while the scene outside the window will be perfectly exposed, so you want to work with the auto-exposure rather than against it as you want the exposure to be constant.
What is backlight?
Backlight is a control that opens the iris of the camera an f-stop or so above that set by the auto-iris. While this may overexpose the lightest areas of the scene, at least the subject will be properly exposed.
What are ways that you can control exposure manually?
You can manually change the exposure by reducing or increasing the aperture of the camera which will enable you to experiment with the tonal levels and free you from using additional lighting sources if you are shooting with poor light. Make sure the brightness levels of the LCD screen are calibrated with the exposure settings of the camera otherwise you could be misled by what the screen is telling you. Another way of manually changing the exposure is by experimenting with the depth of field. This is the distance in front of and beyond the subject that appears to be in focus. A large aperture will give a shallow depth of field whereas small aperture will give a deep depth of field.
What are the different basic shooting modes?
There are three basic shooting modes. The first one is colour slow shutter. This keeps the shutter open for longer to let in more light, but blurs movement and produces as trailing effect. The second mode is night mode. This also gives you a brighter picture of you are shooting in low light however it can result in jerky movements as the shutter remains open for longer. The final mode is infrared night mode. This mode will shoot in total darkness giving a green tinge to footage and a negative effect.
Why might you need to adjust the white balance?
The colour quality of light can vary from scene to scene which creates inconsistency which cause problems in editing and could disorientate the audience. Most cameras have an automatic colour temperature correction feature however this is not foolproof and quick movements from indoors to outdoors may result in the camera having a delayed colour balance shift which can look messy, so by adjusting the white balance, it will tell the camcorder what they colour white looks like so it will base all other colours on this to produce an accurate colour temperature of the scenes that are being shot.
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