Now this is what I call thinking outside the box: Samyang's new Remaster Slim for Sony is a tiny lens housing that lets you swap out the optical elements to enable different focal lengths, rather than needing entirely separate lenses.
As a housing, it packs all of the necessary electronic components for communication between camera and lens, including autofocus. Even with the optical element inserted it's one of the smallest autofocus lens systems around, measuring less than 0.8 inches / 2cm, while it weighs just 2.82oz / 80g.
