The pic that I am looking at is M42_small.jpg.
What I see is types of 2 aberration (excessive shperical and chromatic) and if I am correct I would take the lens back to the seller and demand an exchange under warrenty.
The focus point seems to be half way between Phi(1,2,3,)-Ori and M42. The star near this centre there seems reasonable round. Please observe the distortions around this point and you will see what looks like a comatic blurr that extends radially and with increasing chromatic aberration. Perhaps this is field distortion.
Take a couple of test wide angle terrestrial pics of straight objects and examine the pics.
Jerry.
