Quote:
Originally Posted by mbaddah
So a dob with premium optics can equal in contrast that of a Mak and Refractor?
|
A Dall kirkham Cass ( ie Tak Mewlon) is a reflecting telescope with two aluminised mirrors like a Newtonian. If full attention is payed to the issues of full light baffling ,smooth accurate optics , minimised central obstruction and high quality coatings, then there is no intrinsic reason for any contrast difference between the two types . You will not find all these features optimised in a low cost mass produced dob. I don't know what a Tak Mewlon costs but i would guess that all these features have been played close attention to
Refractor objectives scatter less light than aluminised surfaces , and are easier to baffle properly, but are limited in aperture. Maks are hybrids of which I've seen some really lousy and some really excellent examples of.