Camera Skills

ISO 100 

ISO 1600



With these two short clips its easy to see the difference between the two ISO's, with a dramatic increase within the different clips the influence that ISO has on a shot. This shot in its simplicity is to give evidence that I can adjust a cameras ISO setting to create the best shot I can. These two shots portray that because

The higher the number the more sensitive your camera is to light this means that more light is let onto the footage but the quality deteriorates. The more artificial light on the images the noise or image grain you will get. Using a higher ISO against bad lighting will not work, everything looks bad in bad lighting and using a higher ISO will just make it look worse. ISO values work with exposure 'stops' with an increase of one stop being a doubling of the sensitivity. The relationship of the ISO value to exposure stop is simple. ISO 200 9s a one-stop increase (doubling the sensitivity) over ISO 100. If you increase ISO from 100 to 400, you need to balance that with a two-stop decrease everywhere to maintain the same exposure value, by changing the shutter speed from 1/125 to 1/500.

Pull Focus 



Focusing with DSLRs

A pull focus or a rack focus is a camera technique which allows you to change the focus of the shot, typically just moving from one subject to another. Manual focus is carried out by the user of the camera and is done by adjusting the focus ring on the lens. Autofocus happens when the shutter button is pressed halfway down and the camera automatically focuses on the subject, when a subject is in focus it will automatically lock, useful for motionless shots such as an establishing shot or shooting portraits. Continuous Autofocus is when the user chooses the autofocus option from the menu and means that the camera will focus for as long as the shutter button is half way pressed. Focus Stacking is the technique of taking several images with different focuses in them and combining them to make an image that is sharply focused all the way to the background.



Shutter Speed

1/30



1/250



Is double the frames per second that you are recording, 25 frames per second equals a shutter speed of 1/50th of a second. Frame rate is not shutter speed. Frame rate = image per second and shutter speed = exposure of each frame. This is the length of time that the digital sensor of a camera is exposed to light,  also when a camera shutter is open when taking a photo. The amount of light that reaches the sensor is proportional to the exposure, 1/500th of a second will let half as much light in as 1/250th.

Aperture

Depth of field is effected by aperture, how wide the aperture is to let light in. F stop (F2.8 or F22). Focal length affects the depth of field because the longer the lens the shallower the depth of field is, 400mm lens will give you a shallower depth of field at F2.8 than a 50mm lens at F2.8.