The selfie you get when the phone is switched to 0.5x: the outstretched hand, the face leaning in, the sole pushed at the lens all blow up several times over, the body behind shrinks fast, and room corners, bed edges and subway poles bow outward so the whole room squeezes into one frame.

How to prompt: start with ultrawideselfie,, say where the phone is first (arm straight up, near the floor, held out over a rail), then what is closest to the lens and gets blown up (face, hand, sole), then how the body shrinks away and how the room bends into the frame, then the person's look, age like "an adult man aged 22" and expression. State legs and feet explicitly ("exactly two legs", where each one is), or the wide lens may add a third; for nudes write the penis as an ordinary size far from the lens, or it gets stretched. A face about an arm's length from the lens is enough; closer than that it turns into a blob.