Shutter zoom pictures

For this set of pictures I used DSLR Cannon Camera. 

I set up the shutter speed for 1/25 seconds and manually moved out the zoom lens rapidly while taking the picture to produce the blurry effect. The ISO(image sensitivity) was set up to 100 which created sharp effect of the image and prevented it from being grainy and bad quality. Again, eye can't view this action same way as camera can, therefore this effect is really interesting. For next time I think I should improve more focus to the centre of the image so its more sharp and the background more blurred.