Page 2 : The ASUS ZenFone 4 Selfie Pro Up Close, Two Selfie Cameras, DuoPixel Technology
The ASUS ZenFone 4 Selfie Pro Up Close
Thanks to its thin bezel design, the ASUS ZenFone 4 Selfie Pro (Price Check) has a 5.5″ full HD AMOLED display in a form factor that is smaller, thinner and lighter than the iPhone 7 Plus. The display is protected by Gorilla Glass with a 2.5D contoured edge that merges seamlessly with the diamond-cut chamfer.
Everything is packed into a metal unibody chassis that is just 6.85 mm thick, and weighs only 147 grams. And yes, it has the 3.5 mm audio port. ASUS obviously put a considerable amount of work into the ZenFone 4 Selfie Pro (Price Check).
The ASUS ZenFone 4 Selfie Pro (Price Check) is powered by the Qualcomm Snapdragon 625, which they used most recently in their ZenFone 3 Zoom smartphone. Like the ASUS ZenFone 3 Zoom, it also comes with 4 GB of LPDDR3 SDRAM and 64 GB of internal flash storage.
Two Selfie Cameras!
This is the ASUS ZenFone 4 Selfie Pro’s killer feature – two front cameras for the perfect selfies. They consist of a main high-resolution selfie camera, and a wide-angle selfie camera for group shots. They are both supported by a soft LED flash that is designed to deliver enough fill light for selfies without overexposure and harsh shadows.
The main DuoPixel selfie camera (on the left) has a high-resolution Sony IMX362 sensor paired with f/1.8 lens. This camera boasts twice the light sensitivity of competing selfie cameras, and the astounding capability to take 24 MP photos. Heck, it can even record 4K selfie videos!
The wide-angle selfie camera (on the right) has a 5 MP Omnivision 5670 sensor paired with f/2.2 lens. With a 120° field of view, It allows you to capture a group shot (a wefie) without using a selfie stick.
The two cameras work individually – you switch from one camera to another, depending on whether you want a close up selfie, or a group wefie..[adrotate group=”1″]
The 24MP DuoPixel Technology
You may be wondering how the ASUS ZenFone 4 Selfie Pro (Price Check) takes 24 MP pictures with a 12 MP Sony IMX362 sensor. Note that these 24 MP pictures are taken in a single shot, not stitched from multiple shots (e.g. ASUS Super Resolution). And no, they didn’t just double the pixels.
The IMX362 is a Dual Pixel Autofocus sensor, which means each pixel has two photodiodes. Usually, the two photodiodes are used separately to speed up autofocus, before being combined to capture the pixel data.
When you enable the ASUS DuoPixel Technology for 24 MP photos, the signals from the two photodiodes are not combined to create the final pixel. Instead, they are used to create two pixels, effectively doubling the resolution to 24 MP.
DuoPixel does not merely duplicate the pixels. The two photodiodes are effectively two pixels sharing the same microlens, each recording different beams of light. This is an elegant way to double the effective resolution of the photo. The only drawback – low light performance will suffer because each “pixel” now receives only half of the light. Not to worry though. You can disable DuoPixel for maximum low light performance.