Answer:
Bigger lenses are easier to manufacture and they produce less distortion.
Step-by-step explanation:
A reflecting telescope is best used as a professional research telescope because " Bigger lenses are easier to manufacture and they produce less distortion."
This is evident in the fact that the mirror of a reflecting telescope is simpler and inexpensive to be manufactured.
Also reflecting telescope is known not to support chromatic distortion, which often is a byproduct of dispersion.