Most, if not all lenses, cannot resolve at 250 megapixels at the size of a APS-H sensor. Most of them stop at 20-30 megapixels, just due to limitations in light

Most, if not all lenses, cannot resolve at 250 megapixels at the size of a APS-H sensor. Most of them stop at 20-30 megapixels, just due to limitations in light diffraction. There are a few ways to get around this: developing better lens systems, increasing the size of the sensor, or using the gigapixel approach by stitching thousands of zoomed in photos together into one panorama.