helps the serious backyard astronomer generate images that demonstrate the effect of common aberrations on the quality of the images being viewed through a telescope. Aberrator is attractive and easy to use. You can use it to generate images that demonstrate the effect of a wide range of common aberrations that can seriously impact the quality of images your telescope delivers. Focus, coma, astigmatism, spherical, tube, pinch, turbulence, roughness, and TDE are all addressed in the form of values that are easily adjusted. Just set the values and click your mouse to generate star, planet, aperture, and wavefront images that demonstrate the result of your selected aberrations.