Ultra-realistic cinematic low-key portrait

Ultra-realistic cinematic low-key portrait of the reference man, preserving his exact identity and natural features. Vertical 9:16, waist-up, nearly frontal with head turned slightly left and chin raised. Wearing a stone-beige oversized crew-neck sweatshirt, dark round metal sunglasses, and subtle silver rings, gently adjusting one ring at his waist. Tall soft gray-white rectangular light panel directly behind him against a black studio. Strong backlight only; face and eyes remain in deep shadow, with a subtle rim along hair and shoulders. 85mm, f/2.8, fine film grain, muted warm-gray tones, minimalist editorial mood. No facial brightening, beautification, text, or watermark. Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.