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What is depth of field?

The depth of field is how much of the photograph is in focus. For example, a photograph has “shallow depth of field” if the foreground is in focus and the background is out of focus. In the fololwing photograph, there is a long depth of field, the sunflowers in the foreground are in focus and so are the ones in the distance.   In the following photograph, there is a shallow depth of field, there is one sunflower in focus and then everything in the background is very blurred.   How to control the depth of field The depth of field of a photograph is controlled by the aperture. When you use a wide aperture such as f/2.8 – you will create a shallow depth of field. When you use a small aperture such as f/22 – you will...

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What is the difference between digital and optical zoom?

Optical zoom is a “true” ¬†zoom, like you would get on a film camera. It means that the lens extends and the optics within the camera zoom in on the scene. Digital zoom is a “crop” zoom. The camera enlarges the center of the frame and clips away the edges. You could get the same result by cropping the image on your computer and enlarging it. So what are the pros and cons of each? Optical Zoom Pros Image quality is maintained even when zoomed in Zooming in changes the perspective of the image Cons More expensive Adds weight to the camera Digital Zoom Pros Cheap Adds no weight or bulk to camera Cons Reduces image quality by literally cropping away some of your megapixel rating Could just as easily be done on a computer later if needed Artificial...

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