View Single Post
  #1  
Old 05-07-2010, 10:05 PM
mental4astro's Avatar
mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 4,994
Which are the better corrected EPs?

Hi all,

My likeing of fast Newtonians has led me to have to deal with issues of astigmatism. While more, much more, expensive eyepieces tend to be better corrected, they can cost more than the scope they are being used in. They also can be really, really heavy and with too wide a field of view, over 68 degrees, only complicating matters.

The only modestly priced eyepiece to be well corrected I have found is the 30 year old Edmund Scientific RKE series, only available in the 1.25" barrel size.

While I love my 28mm RKE, I know I'm cheating myself of precious light due to its small field stop.

What are the better corrected EPs in the 2" format not costing a mint, less than $300? This is the type of info missing from just about all the literature I can find.

While coma in a fast Newtonian is one issue, and can be corrected for with coma-correctors, and tolerable using the eyepiece neat, astigmatism is something else.

Mental.
Reply With Quote