The OnePlus 5T doesn't have a telephoto lens. What's going to happen to Portrait Mode?
Now that the OnePlus 5T doesn't have a telephoto lens, what happens to its Portrait Mode?
Well, the answer is pretty short, sweet, and simple: nothing changes — it's still there.
What? Well, the OnePlus 5 actually never used its telephoto lens for the DSLR-emulating Portrait Mode. That was a common misconception — since the iPhone 7 Plus uses its telephoto camera for Portrait, people automatically assumed that it's the same way the OnePlus 5 would function. However, it simply uses its main camera, zooms it at 2x, and uses the secondary camera to assist with depth data, so that it can apply the simulated blur effect to the background.
Therefore, the way the Portrait Mode works on the OnePlus 5T is untouched. In fact, it might be better, as OnePlus promised that it has made developments in its software algorithms to further reduce noise and improve the clarity of portrait shots. We'll be testing that when we get the phone, of course.