[Blaser]

We know that misconvergence is common to 3LCD projectors because they have 3 panels that have to converge at a single point. Failure to do so results in misconvergence.
Misconvergence will vary from projector to another but won't vary given a single projector either it is used in telephoto or wide angle.

Chromatic Aberration on the other hand may vary to some degree, and might be best in a telephoto setup.

Chromatic aberration has a different origin than misconvergence as it does not happen in the panels, but in the lens. I'll try to make it as simple as possible by saying it is distortion in colours produced by the lens. It is the lens that causes different colors not to focus at a single point. Basically Chromatic aberration is caused by a lens having a different refractive index for different wavelengths of light.

There are two types of chromatic aberration:

1) Longitudinal chromatic aberration (tracking error):Difference colors (wavelengths) will focus on different image planes. Projectors use zoom lenses and therefore this form of aberration will affect the picture to certain extent. The amount varies as the lens is zoomed. This form is easier corrected in lenses whereas the following is more difficult

2) Lateral chromatic aberration (registration error):
This is due to the lens magnifying different wavelengths differently.

Chromatic aberration makes "fringes" of colors around the image (see image below obtained from Wikipedia).