Leica has released a new firmware update for the M10-P, M10-R and M10 Monochrom cameras that adds a new Perspective Control feature to the camera for correcting perspective distortion. It’s designed to help get your horizons straighter and to stop vertical lines converging with each other as they get further away from the camera.
It’s a similar effect to using tilt-shift lenses to correct the issues inherent with photographing something on-axis, except this is done digitally. It’s more like the effect you might use in Lightroom or Photoshop than using an optical solution. Except here, it all happens in-camera.