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As resolution decreases to 720p or 480p, you’ll begin to lose details and notice more pixilation.It’s best to invest in an HD webcam, but if you don’t need the details, you can certainly save a few bucks by opting for a unit with lower resolution.Just keep in mind that it’s up to you to readjust the focus if you or the camera move around too much.Fixed focus is the cheapest of all three options and is pretty convenient, considering you’ll never have to adjust it, but it’s much less precise and flexible than the other two options. Digital zoom, however, is sort of a misleading term as it’s actually something more akin to cropping and enlarging your image.Fixed focus lenses have a predetermined focus range and cannot be adjusted. Autofocus is precise and convenient, but it’s the most expensive of the three.Manual focus is less convenient but still allows for precise focusing and is typically less expensive.When you do this, you reduce the number of pixels in your resolution rectangle, which results in poorer image quality.
While some merely offer a 1- or 2-megapixel image, others can capture images with resolutions up to 15 megapixels, which obviously provide a higher quality and more detailed image.The only way to get high resolution when you zoom in is with optical zoom, a feature really only found in higher-end digital cameras.Noise reduction cancels ambient noise by focusing on the frequencies of human voices and turning others down.If, for example, your camera can capture 30 frames per second (fps), there will be less space between each frame than there would be at 15 frames per second, so your video appears fairly smooth.
Units that can capture a high number of frames per second at a high resolution will give you the optimal picture.
Video is made up of a series of images, or frames, played in quick succession to give the appearance of motion.