Get the latest tech news
How big can I print my image?
(Photography) For an image to look as sharp as real life, it needs to have a resolution higher then that of the human eye: usually around 1 arcminute, or 1/60th of a degree. $$ \text{Linear resolution} = \frac{\text{Distance}}{\text{1 radian}} \times 1 \text{ arcminutes} $$ $$ \text{Linear resolution }(\text{inches}) = \text{Distance (m)} \times 0.0115 $$ $$ \text{Features / Inch } = \frac{87}{\text{Distance (m)}} $$ For an image to look good at 1 meter, around an arms-length, it needs a feature size of 1/87th of an inch.
Jul 24, 2025 ( Photography) For an image to look as sharp as real life, it needs to have a resolution higher then that of the human eye: usually around 1 arcminute, or 1/60th of a degree. Nowadays, It’s often the optics are the expensive part, so it makes sense to try and get the most out of them using a very fine pixel grid — resulting in a image with a PPI that’s very different from resolution. Next, walk away until the lines blend into a solid color, and measure the distance between your eyes and the screen:
Or read this on Hacker News
