Generate a hyper-realistic close-up product photography image of a premium smartwatch displayed against a minimalist gray background. Use a 100mm macro lens with an aperture of f/8 to ensure the entire smartwatch is in sharp focus, capturing all details without blur. Set the ISO to 100 and shutter speed to 1/125s to maintain clarity and avoid motion blur. The smartwatch should showcase its sleek design and advanced features, with a focus on unique elements such as the display, buttons, and any customizable features, ensuring that every detail is captured with precision. Soft, natural light should illuminate the watch face and band, highlighting the texture of the materials, whether metal or silicone. The image should evoke a sense of modernity and sophistication, appealing to tech-savvy consumers. In post-production, apply sharpening techniques to ensure that the image remains crisp and clear, ensuring the final output is in ultra-detailed 8K resolution, showcasing the smartwatch's innovative design without any blurriness.