>>4151662No, more distortion, you need elements to correct distortion. The short mount gives you room to add those elements. But the lens isn't where it stops, there are also optical elements on the digital sensor. On a smaller mount, the image is projected more like a point to a fan. The sensor has a lot of flat glass in front of it and each pixel has its own lens. This all affects edge quality, most noticeably on wide angle lenses. Telephotos project a bit straighter.
Sony cameras have the most glass in front of their sensor and wide angle lenses that project the image from a small element across the whole sensor, across such a short distance, suffer extreme, uncorrectable distortion. The only correction that can be made is sensor-side. There's also some extra vignetting around the edges since the light coming in more obliquely doesn't entirely reach the pixels with standard spherical microlenses.
On a large mount, the rear element (hell, all the elements) on a native lens can also be larger, so the "fan" is less severe. Then thinner filters reduce that edge distortion further. Leica takes it a step further by changing the curvature of the pixel-specific lenses to minimize vignetting and distortions even more.
