From single to dual, thats how the camera on smartphones got better. Smarter. Incredible. Ok, faster too with the new image processors that support huge resolution cameras with no lag. Defining that again, none of recent phones do come up 50-60MP cameras, rather a mix-up it. For ex: the Huwaei P20 PRO has a triple system camera, 40MP Colour with two secondary cameras ; a 20MP monochrome (Black and white) and an 8MP optical zoom. Thats actually a very efficient choice for faster performance with too many cameras rather than just a big single one.
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| The nokia 808 pureview is still the best camera phone when it comes to colours |
Apart from that, the triple camera system on the P20 PRO performs three different functions; Colour photos, Single colour or Monochrome photos and a telephoto zoom upto 3X. These three separate modules are used on phones as dual setups with either two of the three. For ex: Few Samsung phones come a colour and a Telephoto lens. Most Huwaei phones either stick to Colour-Telephoto combo or Colour-Monochrome or more price friendly a colour-Depth combination. Thats seems good since triple camera phones aint cheap. But some brands still prefer single cameras (with better specifications) since sometimes One is better than Two, and it works out too.
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| The Honor 9 lite has a 2MP secondary depth sense camera |
First, Dual cameras have two single cameras. And thats where arguing makes no sense. Since you would use any one of the two for most of the time (unless you have a Depth Sense setup). But having an extra lens for a different purpose on the same phone dosent kill you. Sometimes you do need an extra camera that can either shoot a wide angle snap or zoom a bit closer without degrading the photo quality or even take an actual black and white photo which on some occasions might be needed desperately. Plus, it does keep costs low when making the phone. Since you can have every dual camera feature in a single camera (B/W, telephoto, colour, wide angle), provided with a big sensor. And that will perform better. Nothing can stop that. (The LG V20's front camera can shoot both normal and wide selfies)
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| The LG V20 has an ultra 135 degree wide angled camera |
Second, Dual cameras helps to keep cost down with better features and functionality. These can be seen on the low cost budget cameras. All of them now come with a fancy dual setup with either a Depth sensor or a Telephoto or a true monochrome one. Depth sense is most common as camera can produce very good blurred backgrounds and that does look good. Pretty good. You get those DLSR type blurs in not so DSLR type priced camera phones. You do get happy with small things. That dosent mean single cameras are bad at this job. They can do the same thing but with less accuracy. Plus better camera algorithms are needed for a perfect blur which wont be provided in such low cost phones unless you are a fan of Sony or Samsung. Even a true monochrome sensor (widely used in Huwaei phones) is better than a regular RBG one, when it comes to low light shooting. Detailing is better even on small sensors.
As i have mentioned, the answer is kind of what you will expect. YES. We need Dual camera setups on phones than just a heavily specified single camera. That does keep bit of costs in the low side too. Plus having separate camera modules of a specific feature is better (in case of monochrome or depth). As since we just want quality photos with lots of details and accurate colours, that dosent stop single cameas to be inferior. With bigger sensors, better optics, single cameras can be better when it comes basic features aka colour rendering, fine detailing and even overall clarity.
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