> why practically I would prefer this over a computational solution? The camera lens has a bunch more information to work with in terms of depth. Along the sa

> why practically I would prefer this over a computational solution? The camera lens has a bunch more information to work with in terms of depth. Along the same lines, an iPhone can fake bokeh by applying a filter masked by depth information, but it's not really in the same league as the real optical effect you get from a real lens in the field. (In terms of responsiveness and the quality of detail that's captured.) OTOH, as much as I think legitimate optical effects can be useful/special at capture time, I have limited use for computational effects at capture time. As long as the 'digital negative' has all the information, I'd much rather be able to apply the computational effect later. (This is an advantage of digital techniques - you can adjust them later.)