The ZTE Blade V8 Mini comes with a rear dual-camera setup, which consists of one 13MP Bayer sensor and a secondary 2MP camera that provides the image processor with depth data (aka depth sensing camera). This allows the Blade V8 mini to produce images with a prominent shallow depth of field effect (background blur). However, unlike the Vivo V5 Plus dual-camera that can simulate an shallow depth of field effect of a f/0.95 to f/16 apertures, the Blade V8 mini range is more limited, starting at f/1.0 up to f/8. The smaller the f-number, the more blurry the background will appear in the image. This helps to produce a better separation between the subject and distracting background elements.
It's not bad of course, because most people will probably be using this effect with an aperture between f/1.0 to f/4.0. After all, this is used to allow people to take pictures with a very shallow depth of field effect, so there is no real reason to use a very slow aperture that will make the background appear sharper. That being said, it's always nice to have more control over the desired results. Of course like many other dual-lens cameras with a depth-sensing camera, you can refocus on the subject after you captured the image, which is a great feature in my opinion.
The ZTE Blade V8 mini also allows you to produce 3D images by combining two photos together.
I think it's great that we get to see that dual-camera in more affordable phones, so more people can enjoy this very artistic Bokeh effect that you usually only get to enjoy in a large-sensor camera with a fast aperture lens, whether it's a DSLR, mirrorless or a fixed-lens large-sensor compact camera.