This time using Photoshop lens blur filter. The image was a 3mp efl approx 800mm shot therefore low res. Processes for simulating tiltshift tend to be very resource intensive (makes the computer run slow) so I've found that it makes a lot of sense to work with comparatively low res images from the start. Obviously if I was doing this for print I'd work with much higher quality images.
This web based app does a similar job and is free. Again. it prefers being fed lower resolution images. No sign in/login/pets birthday or pound of flesh required. http://tiltshiftmaker.com/