Photographers use Star Filters sometimes to really make the highlights stand out, but if you do not have one you can use GIMP to reproduce the effect.
Star Filter Effect in GIMP
A really simple concept and easy to achieve, however the results are great – Colour Gradient Match Photos. This technique can be useful for creating a mood in a photograph taken from another image. This is more of a quick tip intended to help achieve certain effects and drive development.
Gradient Colour Match
If you don’t have a zoom lens or you’d like to manipulate a certain image in this style then this tutorial for GIMP should help you achieve a similar effect!
The final result!
Here is a small selection of inspiration for the Lens Zoom Blur Effect: