The true resolution of digital cameras isn't measured in pixels, it's measured in cycles per pixel and then related to the sensor size and pixel pitch[0]. Camer

The true resolution of digital cameras isn't measured in pixels, it's measured in cycles per pixel and then related to the sensor size and pixel pitch[0]. Camera sensor pixels are not squares like the pixels in a digital image, they are point samples. You can then interpolate from the point samples onto an arbitrary number of digital pixels, so what matters is basically how close you can still see edges between lines, which depends on more things than the sensor size. When megapixels are quoted for a digital camera, they are either quoting sensor size (resolution) (like on real engineering documentation) or they are just quoting the highest resolution digital image they think they can get away with the software producing (marketing, advertisements), which is arbitrary, which is part of why you do hear not to just select a camera with the most megapixels. It's a pretty deep topic and people do get degrees in basically just digital imaging. Not me though! I don't really understand most of this stuff... [0] https://www.image-engineering.de/library/technotes/742-units-and-conversions-for-resolution https://www.image-engineering.de/library/technotes/742-units...