Originally posted by D1N0 That just takes all then fun out of it and it looks like crap. These algorithms never get the sharpness to blur transition right. Like saying to a painter. Look i have an app that makes art. Why bother with that messy paint and stuff.
I agree it does take the same fun out as you take out when you have to use a cheap plastic feeling Sigma lens (the 85 feels like an overweight $50 kit lens like the F-series) compared to an all metal Pentax limited lens. That is the issue with all Sigmas btw.
Does it look crap? Certainly not if the transition is so simple as the one on your sample image.
The whole Dof/blur thing is exactly the same as any digital filter used in smartphones or other cameras, it's an image
effect you can use. Nothing more. You can achieve it via physical glass or by using software. There are dozens of visual effects and it is just one.
Just to be clear: I happen to use both a Sigma 84/1.4 and a Canon 85/1.2 partially for the background blur reason and I am happy with them. But it is not a religion and there are other means to the same end.
If the subject is not moving, stitching slower lens images gives the exact same results. And most samples actually were not dynamic subjects.