Quote:
|
Originally Posted by matt
As in all things astronomical, you generally get what you pay for.
|
I have to agree here and choosing a barlow isnt the place where you want to be economising. Buy a poor barlow and every eyepiece you put in it will be degraded, even top shelf ones.
Buy a good barlow and you'll keep it forever.
Cheaper barlows usually have poor coatings, resulting in excess light scatter and reflections. For an analogy, think of the difference in driving at night with a dirty windscreen with oncomming headlights as compared to a clean one.