>>4148535It's huge because the distance to the sensor that used to be the mirror box is now inside the lens. That gives lens designers more room for corrective elements, but the overall depth of the camera remains about the same.
The only way lenses can be made smaller for mirrorless is "unacceptable" in this gearfag controlled market because you have two options: slower apertures, or symmetrical lenses. Symmetrical wide angles at these flange distances have too much vignetting for people and not enough room to correct every aberration known to man. This is a 20mm L mount lens.
