Week 1.

In this first week, the teacher talked about Cameras and and the basic on how to use it such as exposure, ISO, ect... Throughout the year, I will be using my own Reflex Canon 600D and at college I will use a Canon 700D.

-DSLR Camera

DSLR (or SLR) means "Digital single-lens reflex camera" and it is a digital camera that combines the optics and mechanisms of a single-lens camera with a digital imaging sensor. Basically:

-You can see exactly what the lens sees

-You can interchange the lens

-It has a large image sensors that produce the photos in high quality

How it works.

1. The light passes through the lens and hit the mirror(green)

2. Then it's shown in the pentaprism(yellow), so you can see it through the viewfinder

3. Once the picture is taken, the mirror flips up and the shutter (blue) opens and the exposes the digital image sensor(red) to light.

-The Exposure Triangle

The Exposure Triangle is the name for the three fundamental elements in exposure:

-Aperture (lens opening)

-Exposure time (shutter speed)

-Light Sensitivity (ISO)

Aperture.

The aperture is a hole inside the lens, through which the light passes into the camera body. It is expressed in "f/numbers", for example f/5.6.

These are called "f/stops": a small aperture means a larger hole while a larger aperture means a small hole. A large f/number such as f/32 brings the foreground and background in focus. Conversely, a small number like f/1.4 focuses just on the foreground making the object sharp while the background will be blurry.

Shutter speed.

The shutter speed, or exposure time, is the length of time a camera shutter is open to expose light into the camera sensor.

If the shutter speed is fast, it also helps to freeze the action. Otherwise, if it is slow it can create an effect called "motion blur", so the objects appears blurred and this effect is usually used for cars and motorbikes and the intentions for the viewer are the moving wheels.

The shutter speed is usually measured in fractions of a second, when under a second.

Light Sensitivity (ISO)

The light sensitivity, or just ISO, is responsible for gathering light and transforming it into an image.

With high sensitivity, the sensor can capture the image in low-light places without having to use the flash. Also it adds grain or "noise" to the picture.

In a few words: ISO is the level of sensitivity of the camera to available light. The lower the number, the less sensitive is to light while a high number increases the sensitivity of the camera.

White Balance

The white balance (WB) in photography is used to adjust the colors of the photo to make it look more natural, so for example an object that appears white in reality will be white as well in the picture. It is really important to check the WB and fix it before starting taking pictures.

Most of the cameras, like DSLRs, have variety of WB settings.

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