Exposure

Exposure = shutter speed + aperture + I.S.O

Light = wavelength – different colours have different wavelengths creating a depth of colour either dark or bright.

They are 4 types of exposure which are; overexposed, correct exposure, underexposed and H.D.R (hiem dynamic range).

Overexposed– This is where the image will have to much light and minimise the detail in the image

Correct exposure– There is a balance between the light and image. Also it does not loose any detail in the image and is correctly exposed.

Underexposed– This is where the image does not have enough light and the image will appear to be dark, meaning the detail will not be able to be seen.

H.D.R– This is where you take multiple photos with different exposure and then mash them together to make on complete photo.

Shutter speed is measure in seconds for example 1/150 seconds or 1/4000 seconds. This will adjust the time it takes for the shutter to close. The faster the shutter speed, the shorter the time the image sensor is exposed to light. Therefore the slower the shutter speed, the longer the time the image sensor is exposed to light. In a way you could say shutter speed is a tool for perfecting exposure, controlling blurring and creating an interesting effect.

Sensors

CCD– A circuit that stores and displays the data for an image in such a way that each pixel in the image is converted into an electrical charge of which is related to a colour in the colour spectrum

Relatively noise free
Shifting pixels was electrically
inefficient
Serial readout is slow
Sensors require electricity

CMOS– This is an active- pixel sensor consisting of an integrated circuit containing an array of pixel sensors, each pixel has a built in capacitor and amplifier