One of the strengths of the OnePlus 7 Pro is represented by the photographic sector, which on the back can count on a 48-megapixel main sensor, flanked by an 8-megapixel telephoto lens and a 16-megapixel wide-angle lens.
The Chinese manufacturer advertises the telephoto lens as capable of guaranteeing a 3x zoom but it seems that, in reality, the result offered is closer to a 2.2x zoom.
OnePlus 7 Pro uses the telephoto lens horizontally but the field of view is different when using portrait mode and 3x zoom. The sensor used is a 13-megapixel Samsung S5K3M5 and the telephoto lens cuts photos up to 8 megapixels for 3x zoom and in doing so it loses the visual field.