Читать книгу The PhotoGuides Guide to Photography - Ash Davies - Страница 3

Chapter 1

Cameras 101

The digital camera is a beautifully simple piece of technology. Every camera, be it film or digital, works in the same basic way. Light from the scene beams through your camera’s lens, through the aperture, through the shutter and onto your camera’s film or sensor. This light paints our photograph.

Point and Shoot Cameras

Point and Shoot cameras are cameras with fixed, non interchangeable lenses. Point and Shoot cameras are generally compact and automated. The camera manages everything for you automatically, leaving you to just point the camera at the scene and shoot the photo. Point and Shoot cameras are becoming more capable, but they will never match the overall image quality of an SLR.

SLR

SLR stands for Single-Lens Reflex. SLRs are the larger, more ‘professional’ looking cameras that allow you to change lenses and delve deep into the settings. The name SLR explains the mirror and viewfinder system within the camera. Light comes through the lens, bounces off a series of mirrors and can then be seen through the viewfinder. By changing lenses you can explore new realms of photography, from macro to zoom, from wide angle to tilt shift. SLRs are wonderfully expandable, incredibly capable cameras.

Megapixels

Every digital camera contains a digital sensor that captures light and creates your photograph. Your photograph is made up of millions of dots of light. Each tiny dot of light is called a pixel, so your camera’s Megapixel specification denotes the size and resolution of your photos. More megapixels will allow you to print your photographs in a larger size or zoom in further on a computer. Be careful though when looking at cameras. More megapixels doesn’t always mean a better quality photo. Some cheap, high megapixel cameras can produce noisy, low quality images. Megapixels are an important characteristic of a camera, but they don’t mean everything.