Is the Samyang Remaster Slim Really Worth it?

Not the first brand you think of when it comes to innovation in photography, Samyang has recently announced the first-ever optical exchange autofocus lens. The Remaster Slim lens they've launched is unique in the way it's designed, and it allows you to swap out the central optical elements as desired. Yup, you read that right; you don't swap out the whole lens, just the main lens element is changed when you want a different focal length. This could totally change the way photographers of the fut...