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Capturing images
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- 2. View finder • Aviewfinder is what the photographer looks through to focus the picture. • Viewfinders are used in many cameras for different types of things: still, movie, film, analogue and digital. • A zoom camera usually zooms into the finder and links it with the lens, a camera that doesn’t do this is rangefinder cameras. Examples A twin-lens reflex camera is a type of camera that has two lenses of the same focal length. One of the lenses takes the picture, while the other is used for the viewfinder system, which is usually viewed from above at waist level. Single-lens reflex viewfinders A single-lens reflex camera (SLR) uses the mirror and prism system it shows the photographer the view through the lens and allows them to see what they are taking a picture of.
- 3. Lens Fisheye lenses Fisheye lenses(8-16mm) range from lenses that produce images with a slightly curved or bowed appearance, and a field of view that is up to 180 degrees. Ultra Wide-angle lenses Ultra wide-angle lenses fall range from 10- 24mm rand have a very wide angle of view, which allows the camera to work very close on the subject and still include it all in the frame Wide-angle lenses A typical wide-angle lens falls size from 24-35mm . a wide-angle kit lens range frome 18-55mm, it can be a fixed focal length prime lens. Short telephoto lenses the Lenses sizes that range from 100-200mm range are known as short telephotos. They are used for isolating specific subjects within landscapes, and for portraits and close-up work. Long telephoto lenses Long telephotos are used for to focus and bring closer images. It can focus up to lengths up to 300-600mm and have a very narrow angle of view. People mostly use this for wildlife and sports. Standard lenses A standard lens is 50mm for DSLRs with a full frame sensor. The focal length for crop-sensor is between 28- 35mm range, but depends on the camera model.
- 4. Image sensor A sensoris a device which captures the light so that the camera is able to form a digital image. CCD sensor CMOS sensor Foveon X3 sensor LiveMOS sensor Sensor Sizes
- 5. Aperture • Aperture meanshow much light is exposed for the camera • Photographs with a subject that are in focus and have beautiful blurred backgrounds, means that this is the effect of a wide aperture • A wide aperture is the best way for taking pictures because more light is being used. However less of the picture is in focus Sizes of aperture holes
- 6. shutter Shutter means howlong the camera stays open this means how much light is able to reach the sensor before it closes Shutter speeds are measured in seconds and fractions of seconds the longer the shutter remains open mean that the photographer can set the aperture and this means more light can reach the sensor. 1/4000th sec – Freezing motion 1/250th sec – Handheld sharpness 1/30th sec – Panning
- 7. memory Memory Stick DuoMemory Cards SDXC (Secure Digital ‘Xtra Capacity’) Memory Cards: xD Picture Memory Cards: Memory card reader A memory card reader transfers photos to computers without having to have a USB cable for any specific camera.
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