Recently I saw a review on an inexpensive anamorphic lens on a smaller format camera, 50mm 1.8x on M43. In general, an anamorphic lens is much more expensive than the regular lens due to the more complex manufacturing procedure.
What's the advantage of a 50mm 1.8x anamorphic lens on a M43 format over a, say, 28mm or 25mm lens on a full frame? Yes, I can see it let a smaller format camera to produce an image of a cropped larger format. That's all?