I would like to know what is meant by a mirror being 1/4 wave or 1/8 wave and diffraction limited. Am I right in assuming that a 1/8 wave mirror is better than a 1/4 wave mirror? Is it "twice" as good? Is it reasonable to assume that a mirror that is listed as 1/10 wave could actually be worth $200, or would it be deffective in some other way? Has anyone heard of a mirror that is 1/15 wave for less than $300? What do they mean by saying a mirror is diffraction limited? How would a diffracion limited mirror compare to any of the above mirrors?
Thanks from a Newbie.
Thanks from a Newbie.