Gravitational Lensing
The file big-lens-grid0lensedimage.gif has a grid line drawn every 50 pixels. 1 pixel = 0.38 arcseconds.

File listing:

big-lens-0human-parameters.txt

big-lens-0lensedimage.gif

big-lens-0parameters.txt

big-lens-grid0human-parameters.txt

big-lens-grid0lensedimage.gif

big-lens-grid0parameters.txt

source.gif