Atmospheric depth effect: distant planes shift blue and lose contrast through haze and particles — creates spatial dimension naturally.
The atmosphere works for you—if you use it correctly. Aerial perspective occurs because light rays are scattered by haze, water vapor, and airborne particles. The greater the distance between the camera and the subject, the more air mass lies between them. This weakens contrasts, desaturates colors (especially towards blue and cyan), and blurs details. You don't need lens tricks for this—nature provides the sense of depth itself.
Practically, you use it like this: When shooting a landscape scene—mountainous terrain, plains, city skyline—consciously work with planes of focus. The foreground remains saturated, high-contrast, sharp. The middle ground already loses punch. The background? Almost monochromatic, de-saturated, veiled in blue. This creates spatial layering without you having to juggle focal lengths. A 50mm lens can be more effective in creating depth than an extreme wide-angle if aerial perspective is at play.
Lighting determines the effect. With backlighting—the sun behind distant mountains—the scattering becomes dramatically visible. The haze lights up, the contours disappear. With flat frontal light, the effect is subtler, but still present. That's why shooting times with haze, smoke, or morning fog are so valuable for productions. You'll achieve the image faster than with focus stacking and color grading.
A note for editing and grading: Aerial perspective can be digitally enhanced, but only to a limited extent. You can desaturate individual layers, reduce sharpness, increase lift on the highlights—but if the physical sense of depth wasn't present in front of the lens, it will look artificial. So, shoot consciously for this effect. Utilize natural fog zones, long sightlines, multiple layers one behind the other. Then, spatial depth is created that the viewer feels, without knowing why.