DIGITAL ZOOM. STEP ONE: Turn off the digital zoom feature. STEP TWO: Don’t ever turn it on again. Works by, cropping the image and then scaling that cropped.

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Presentation transcript:

DIGITAL ZOOM

STEP ONE: Turn off the digital zoom feature. STEP TWO: Don’t ever turn it on again. Works by, cropping the image and then scaling that cropped area up to the full size of the frame. Usually bad because they use bad interpolation algorithms (method of creating data points) when they scale up, so they tend to produce jagged, blocky images.

FOUR OCCASSIONS DIGITAL ZOOM IS USEFUL 1) If you don’t have any image editing software that is capable of cropping and unsampling. 2) If you do not want to magnify the JPEG, (a commonly used method of lossy compression for digital photography)artifacts in your image. 3) If shooting at low resolution on camera. 4) If you need a close up of something beyond camera’s optical zoom.

SLR LENSES Usually SLR lens is removable. SLR most likely will have a focus ring, which allows you to focus the camera manually. You can chose lenses tailored to your style of shooting, I.E. if you mostly shoot sports images, you might want a longer, telephoto lens.

SLR LENSES Lenses fall into 2 categories, 1 – zoom lens, which allows you to vary focal length to go from wide angle to telephoto 2 – prime lenses, which have a fixed focal length. PRIME LENSES, are sometime sharper than the same focal length in a zoom lens, but ZOOM LENSES let you carry the equivalent of a huge number of prime lenses.

FOCAL LENGTH Your lens projects a circular image, but your camera’s image sensor crops a rectangular portion out of that image. The amount that is cropped, depends on the size of the sensor. This is why different sensor sizes yield different field’s of view for any given focal length.

FOCAL LENGTH (MM) The standard frame size is 35mm. On a 35mm film camera, a 50 mm lens is considered. (Normal lens) A 200 mm is considered telephoto and 28 mm is considered wide angle.

EXAMPLE OF FOCAL LENGTH

BASIC CONTROLS POWER SWITCH: button, sliding switch, or rocker switch of some kind. Some power switches allow you to do multiple things, such as turn on the light for the LCD screen. SHUTTER BUTTON: button used to auto focus image/ take picture. ZOOM CONTROL: P&S = electronic zoom. SLR = riding the zoom, using the ring around the lens.

STATUS DISPLAY Most camera’s provide a control that lets you deactivate the status display or cycle through different configurations of status information. Button is usually known as DISP Pressing the button repeatedly will show different status screens.

STATUS DISPLAY