As the launch of the Samsung Galaxy S21 approaches, more and more information about what this flagship model will offer in the battle against the iPhone 12. And now we have the best look yet at the Galaxy S21 Ultra.

We've already seen one render showcasing what the S21 Ultra will look like, but apparently it wasn't quite accurate. Therefore, we have a whole new render with one important new detail - a fifth camera lens we have never seen before.

This new rendering comes from OnLeaks, who was the first to show us both the Galaxy S21 and S21 Ultra. Now he's back with an all-new rendering of the latest S21 Ultra design prototype.

As seen in the image above, it has five rear camera lenses, or as OnLeaks claims, four cameras and an additional sensor.

Some rumors suggest that the S21 series will have a ridiculously large 180MP or 150MP camera lens, but recent rumors suggest that the Galaxy S21 Ultra will have the same 108MP main camera lens as the S20 Ultra. We also heard the possibility that it will have two telephoto lenses, offering both 3x optical zoom and 10x periscope zoom.

So what are these sensors on the back of OnLeaks' new S21 Ultra rendering? Naturally, the main lens will be joined by an ultra-wide angle lens of some sort. Likewise, assuming there are two telephoto lenses, that leaves one mystery sensor of which we have heard nothing.

The simplest explanation would be that it is the Time of Flight sensor, which has been included in Samsung's ultra-premium models since the launch of the Galaxy S10 5G. the ToF sensor emits a series of infrared light pulses and calculates an object's distance based on the time it takes for that light to bounce back It is being touted as a lens that will improve 3D imaging, augmented reality (AR), gesture recognition, and other capabilities that rely on the camera being able to accurately map what it is seeing.

However, it may be something else entirely. Apple introduced LiDAR in its iPad Pro series to accomplish much the same thing, and recently included the sensor in the iPhone 12 Pro and 12 Pro Max. However, while similar to ToF, LIDAR is said to be more accurate because it uses multiple laser beams rather than infrared pulses.

ToF has been around for several years and LIDAR would be a sensible upgrade.

Other phone makers have included various types of lenses in the past, with macro lenses being one of the most prominent recent examples; the monochrome lens on the OnePlus 8T is another, but it is hard to imagine Samsung treating such hardware frivolously.

So our guess is either Time of Flight or a LIDAR upgrade. But maybe Samsung has something new and unique lined up for us instead. We're just going to have to be patient and see if we hear anything else before the Galaxy S21 rumor January launch window.