Asus ZenFone 3 (ZE552KL) smartphone was launched in May 2016. The phone comes with a 5.50-inch touchscreen display with a resolution of 1080 pixels by 1920 pixels at a PPI of 480 pixels per inch. It is powered by 2GHz octa-core Qualcomm Snapdragon 625 processor and it comes with 4GB of RAM. The phone packs 64GB of internal storage that can be expanded up to 128GB via a microSD card. As far as the cameras are concerned, the Asus ZenFone 3 packs a 16-megapixel primary camera on the rear and a 8-megapixel front shooter for selfies.

The Asus ZenFone 3  runs Android 6.0 and is powered by a 3000mAh non removable battery. It measures 152.50 x 77.30 x 7.60 (height x width x thickness) and weighs 155.00 grams. The phone is a dual SIM (GSM and GSM) smartphone that accepts Micro-SIM and Nano-SIM Connectivity options include Wi-Fi, GPS, Bluetooth, FM, 3G, 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include Proximity sensor, Ambient light sensor, Accelerometer, and Gyroscope.


I am personally not a big fan of large phones. I find them hard to carry and even more harder to put them in my pant pockets. However, ASUS has managed to create a phone which has the large 5.5 inch screen and yet think and sleek enough for it to fit in the palm of your hand very well. The matte finish around the edge gives a nice grip on the hand and the beautiful gorilla glass on the back makes it look like a phone from the future.

Its all about photography

The reason why I chose to test this phone was because its main selling point is the camera functionality and that is what I am going to talk about here.

As a nature photographer, I would always like to have my phone compliment the main camera that I am carrying. Most of the phones have failed so far because they either do not reproduce the colors of nature very well or they perform really well in low light conditions.

Most of the camera phones seem to focus purely on the packing in as many megapixels in the phone as possible, while forgetting to include all import features of a good camera – response time, focussing speed, low light performance etc. For a wildlife and street photographer, the speed at which the camera app launches is the most important thing.

Laser Focus

The phone uses a laser system to auto-focus instead of traditional contrast detection, which is what most cameras do. It is pretty simple. Our traditional systems detect the difference in contrast at various focal points and find the best focus. But the ZenFone 3 uses the good old laser system—it emits a tiny infrared laser, which bounces off the subject and back towards the camera, where a sensor registers it. By calculating the time it takes to bounce off the subject, the camera is able to figure out the distance the subject is from the lens and is able to focus straight on the subject.

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