> SLR is a specialized format designed for fast autofocus used by news/sports photographers Designed for, no. Optimised for and evolved for, yes! :-) When the

> SLR is a specialized format designed for fast autofocus used by news/sports photographers Designed for, no. Optimised for and evolved for, yes! :-) When the SLR emerged it was definitely slower than the cameras press photographers were using. Even the later instant-return-mirror models, probably. Press photographers didn't switch to SLRs until the Nikon F arrived fifteen years later, in the first few years of the Laos and Vietnam wars. Press shooters mostly hadn't been shooting 35mm for more than a decade before that. The rest: I'm not convinced at this point, and I think high-end mirrorless really blurs most of those boundaries pretty conclusively. We're definitely stepping towards a formatless world in the sense of distinct boundaries, with computational photography being a big part of it. Which is precisely why I'd urge really any digital photographer to spend as much time learning to get the best out of their mobile phone as possible. It is one point on the continuum; small sensors but a lot of computation.