How much do megapixels count in cameras?


What Megapixels means, how to adjust when taking photos with the camera and mobile phone

When we buy a new phone one of the parameters that we immediately look at are the number of Megapixels present in the rear and front camera, convinced that a large number is sufficient to be sure of having a phone in front of you that makes very good photographs. Unfortunately, the Megapixl number is one of the most used features in terms of advertising and could easily mislead a user who is not very attentive or who does not know how a camera works on a smartphone.


In this guide, we will show you in concrete how much the Megapixels count in the cameras of the phones and what other parameters we must take into consideration before buying a new smartphone with good photographic abilities.

What is a Megapixel

Megapixel measures the resolution of a horizontal and vertical image. Basically, if you take an image and start counting pixels from a low angle, you can multiply the two dimensions to get the total number of pixels in the image. The more pixels there are, the higher the resolution. A megapixel is literally a million pixels in the digital image.

calculate how many megapixels a camera can produce
calculate how many megapixels a camera can produce

To calculate how many megapixels a camera can produce, just multiply the horizontal and vertical resolutions of the sensor, and divide the result by one million.

  • 1000 × 1000, for example, is a Megapixel.
  • A 1920 × 1080 image is a little more than two Megapixels.
  • A 4K image is more than 8 Megapixels.

Knowing when Megapixels are present on the camera we will get an idea of ​​the size of the image in terms of resolution and also when the final file will be large (larger files take up more space). Therefore, choosing a camera or a phone looking only at the Megapixels will therefore not give us a true picture of the quality of the photos taken: we will have the certainty of having only very large photos!

For example, today phones with 108 Megapixel cameras are on the market, such as the Xiaomi Mi Note 10 (€ 419), able to achieve really great shots and to shoot videos in 4K with a truly enviable colour rendering!

To get very beautiful photos we will not have to look only at Megapixels since there are other characteristics to be taken into consideration when choosing the camera: colour accuracy, low light performance, lens quality, sensor size and number of cameras available for shooting.

The importance of the number of cameras

If we are looking for superior photographic quality on smartphones we will not have to observe the number of megapixels expressed by the camera, but we will have to check the number of rear cameras placed side by side with the main sensor, as in the case of the Nokia 7.2 (350 €).

These additional cameras allow you to reconstruct a single photo but with a greater number of details and colours: one camera takes the normal shot, another the black and white shot and the rest with various levels of saturation, so you can capture all the colours of the subject present in the shot.

Once all these intermediate shots have been generated, the photographic chip of the phone (guided by artificial intelligence) will combine all the shots into a single photograph, which will present a high level of detail and a great variety of colours, all difficult to reach with a single camera.

Parameters for choosing a good camera

Without going into too much detail, before choosing a good camera or smartphone to take photos, let’s be sure to immediately observe the following parameters:

  • A number of cameras: we must make sure that there are at least 3 rear cameras so that we can take good quality shots immediately without having to tinker among the options.
  • Sensor type: the sensor makes the difference between a beautiful image and a bad image. Make sure that CMOS sensors are present on all cameras on the back of the device.
  • Lens protection: the protective glass of the lenses helps a lot in the capture of light and on the level of detail of the photo. We avoid plastic protections, which deform the image and make it unrealistic.
  • Management software: using a good photo app will also make the difference between mediocre shots and spectacular shots. Usually, the app provided by the manufacturer is excellent for all purposes
  • Megapixel: even if it is the last parameter to be observed, make sure that there is a sensor of at least 13 Megapixel (in the case of multi-cameras, the central sensor is sufficient), so as to be able to create photos large enough to print even on posters or on billboards.

Final Word

We have shown you in a few lines when Megapixels count inside the cameras: they are a useful but not essential parameter for choosing a new smartphone or a professional SLR.

In the case of reflex cameras, the lenses we choose always make the difference, while on smartphones we will have to focus more on the number of rear cameras available, so as to ensure that every shot is taken at the highest quality.



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