Periscope-style zoom lenses are the latest big thing in mobile photography as they allow to squeeze longer zoom factors than before into the thin bodies of high-end smartphones. Huawei just launched the P30 Pro with a 5x optical zoom and OPPO's Reno device with a similar setup is set to launch on April 10, 2019.

Despite still being more than a week away from the official launch date, a video has surfaced on the Chinese social media site Weibo, showing a teardown of the Reno's rear camera, including the innovative tele lens, and it's fascinating to see how much technology and optical engineering can fit into such a tiny module.

The periscope camera only measures 23.5 x 11.5 x 5.73mm, making it thin enough to fit into phones without the need for a big camera hump. It also doesn't take up much space in the body overall and therefore does not get into the way of other components.

A close-up of the periscope-style camera array on the Huawei P30 Pro.

The module consists of the image sensor, lenses and the prism that diverts the incoming light into the lens and onto the sensor. Optical image stabilization is achieved through a magnetic coil that moved the prism. Optical image stabilization is also available on the camera's primary wide-angle and image data captured by the two cameras can be combined to generate a 10x hybrid-zoom image.

We also already know that at least one version of the Reno will be powered by Qualcomm's top-end chipset Snapdragon 855-powered and come with a 6.4-inch AMOLED display with 2340 x 1080 pixel resolution. So, overall the upcoming OPPO looks like it could be a real competitor to the P30 Pro.