Workings of DUAL CAMERA
Dual Camera is a fashion for today. Today’s every single man have a Smartphone with varieties features, and every 1st one is the competitor of 2nd one. In this craze Smartphone camera is also in this competition. Good end efficient camera with excellent resolution is also preferable but “DUAL CAMERA” in also come in this rumored. Every one now find this dual camera features in their Smartphone.
But did you all know about this Dual Camera?? Features of this?? How it is work??
Hey guys, don’t worried about this. In my this article you will get a good knowledge about this.
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Dual camera phones feature use two cameras including a primary camera and a second primary camera. Primary camera does the same work or with little modification as it does in typical smartphone while the second primary camera normally has 2 features. The first is to add clarity of the image with the help of monochrome feature and the second is for zooming purpose. And sometimes in a dual lens camera setup one camera is used to take the pictures and the other one is to capture the depth of field.
Advantages of dual lens camera in smartphones :
1. Greater depth of field in pictures
2. Faster focus
3. Refocus ability
4. Better picture clarity
DSLR lenses with variable focal length lenses or point-and-shoot cameras with zoom lenses, smartphone cameras are stuck with small, fixed lenses. This means that a smartphone camera’s focal length is fixed, leaving no option but to rely on digital zoom to close in on details in an image.
However, digital zoom isn’t much good for anything more than minor zoom-ins, as we are stuck with a limited resolution and set field of view for near and far details, meaning that a pixel can only capture so much detail at a distance. This limitation is why images appear pixelated as you zoom in, and it’s exactly the same as simply magnifying the image in a gallery app post shutter.
Variable lenses, such as those found in DSLR setups, allow for an adjustable focal length and therefore field of view too. A longer focal length narrows the camera’s field of view, but this means that the same limited resolution image sensor captures its detail over a smaller area, so each pixel represents a finer point in space. This is why optical zoom doesn’t suffer from the same pixelation problems as digital zoom.
When it comes to measuring a camera’s or lens’ zoom, we need a reference or starting point for the camera or lens we’re talking about. To find any zoom level we divide the current focal length by the minimum available. So moving from 25 mm to 50 mm is equal to a 2x zoom, as is moving from 18 mm to 36 mm. Zoom is a relative term, but it has a direct relationship between two focal lengths.
Dual camera offers a better result
When it comes to dual camera smartphones with a “telephoto” lens, we’re actually looking at two sensors, each with a lens pairing that offers up fixed, but different, focal lengths. For example, one may offer a 24 mm focal length and the other 36 mm, giving us 1.5x worth of “optical zoom” potential. Of course there is no real zoom going on as no parts are moving, but the end result is the same, so we’ll continue using that term. The sensor sizes, pixel sizes, and lens aperture may also vary between sensors, which of course will have their own influences on image quality from each camera.
Looking at the iPhone 7 Plus, Apple has opted for one 28 mm and one 56 mm lens, offering up a 2x optical zoom potential. This means that we can capture close up shots with a 28 mm 1x zoom, and then simply switch to the 56 mm 2x zoom lens and capture pictures at greater distances without any loss in detail.
Although dual camera technology represents a notable step forward for smartphone photography, we should be aware that there are some major caveats right now. The first being that even dual cameras are still limited to fixed focal lengths and are therefore incapable of offering up the true range of optical zoom capabilities that the marketing might lead us to believe.
That being said, there are notable benefits to this technology over a traditional digital zoom, including superior quality zoom at long distances. You also get the option to enable superior post processing effects, including digital bokeh and advanced HDR. And let’s not forget the creative freedom that these configurations offer photography enthusiasts.