(Pocket-lint) - These days if you hear about a phone with fewer than two rear cameras it's a bit of a surprise. Manufacturers are cramming more lenses and sensors into devices than ever before. Indeed, the new Huawei P40 Pro+ has a penta camera arrangement - that's five cameras on its back - to offer greater versatility in shooting.

But why those five cameras, what can the lenses do, and does the P40 Pro+ offer the best cameras in a phone to date? Here's a breakdown of what's what.

Huawei P40 Pro+: Why 5 cameras?

  • 1: Main camera: 50MP SuperSensing sensor, 1/1.28in size, f/1.9 aperture, 24mm equivalent, optical stabilisation (OIS)
  • 2: Ultra-wide camera: 40MP cine lens, f/1.8, 18mm
  • 3: Zoom lens #1: 3x optical (72mm), 8MP, f/2.4, OIS
  • 4: Zoom lens #2: 10x optical (240mm) periscope, 8MP, f/4.4, OIS
  • 5: Time-of-Flight (ToF) depth sensor

The reason to have more than one camera is to offer different views onto the world. One lens might not be able to squeeze in that group shot, for example, or you might want to shoot a subject further away without losing quality.

This is the reason the Huawei P40 Pro+ has five optics on its rear camera, each linked up to its own sensor. There's the main camera - which we'll detail more below - and a wider-angle offering, which fits more into the frame, alongside two zoom lenses to enable further away subjects to appear close-up in the frame.

The fifth "camera" on the P40 Pro+ is a depth sensor, or Time-of-Flight sensor, which arguably isn't a traditional camera as such, as its small amount of resolution data is only utilised to map out distance - which can then be used by software to aid background blur (bokeh) with greater accuracy.

Huawei P40 Pro+: What's a SuperSensing sensor?

  • Red, yellow, blue array (RYYB) [Not red, green, blue (RGB)]
  • Yellow frequency better for low-light capture

The P40 Pro+ does more than just chuck a bunch of cameras together, though, as Huawei is using its own technologies in additionally creative ways. The first of which is the SuperSensing sensor that the main camera uses.

The idea behind this - which we first saw in the P30 Pro - is to read red, yellow and blue light (in a RYYB 4x4 arrangement) rather than the usual red, green, blue (Bayer array). Yellow light frequencies respond differently and, therefore, are better for low-light shooting in terms of what the sensor can derive from incoming light information. It works, too, as we pointed out in our Mate 30 Pro and P40 Pro reviews.

However, this particular sensor goes even further. First up, it's 50-megapixels, making it highly resolute. Secondly, its size, at 1/1.28in, is roughly double that of a normal phone-camera sensor. That means each 'pixel' on its surface is larger, granting greater light-gathering properties.

Furthermore, Huawei uses a four-in-one processing method (oversampling) where the end results are 12.5-megapixels, delivering even crisper images in this downsized yet still large-format scale. You can shoot at full resolution if you would rather too.

Huawei P40 Pro+: Are 5 cameras better than 1?

  • 18mm, 24mm, 72mm and 240mm equivalent focal lengths
  • Ultra-wide, standard, and two separate zoom lenses

A lot of cameras offer "zoom", but if it's digital zoom then all it's doing is cutting into the image and creating imaginary pixels from the ones around it (similar to upscaling).

Yes, there are intelligent algorithms that can do this in clever ways - but the resolve of digital cropping is never as refined as a true optical zoom, where a lens is designed to give optimum detail.

That's why the P40 Pro+ has two zoom lenses. If it just jumped from its main camera all the way up to its zoom maximum that'd be excessive. By adding 'steps' between - here a 3x zoom before the 10x - it's able to gather information from the main sensor and two zooms to compile the best information from them all, for the best possible results.

It's still possible to pinch-to-zoom in-between those given focal lengths, such as 2x, 5x, 7x and so on, with results still pretty decent thanks to this combination method.

We're a little perplexed why the P40 Pro+ didn't opt for the 5x optical zoom and RYYB sensor of the P40 Pro, though, as that combination would surely make better sense. Perhaps it's just being saved for the 'P50 Pro', eh?

Anyway, having all these lenses, used to complement one another, doesn't feel like you're using five cameras. The experience is fluid between the lot, thus the penta setup is really all about enabling greater versatility and shooting potential. So, yes, having five cameras is certainly better than one or two.

Writing by Mike Lowe.