Gimp: In just a few steps to a Fisheye effect
- First, you click in the menu bar, click "Filter"
- In the sub-menu you can call up the Option "Distort".
- In the last step, then select "lens error".
- In the menu "object error" then you can make the crucial settings: the Case of the first two options "image" and "edges" are recommended in the rule 100 %.
- In the case of the other options, you have to try something, however, should be no Problem: GIMP gives you a relatively large preview and automatically adjusts all of the Changes.

The image editing program GIMP
Also very beautiful and sometimes surprising results through the Sepia and Vintage effects in GIMP.
