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A review of the 31 Nagler vs. the 32 Edmund Erfle

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#51 PJ Anway

PJ Anway

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Posted 16 December 2011 - 08:32 AM

Hi all,
The FOV indicated for the 32 Edmond Erfle is 82 degrees. Isn't it 60?
Also it's described as a 6 element eyepiece. isn't it a 5-element?
Any takes on this?


By measuring the true field and calculating the apparent field, I got 72°. Closer to the stated 68° AFOV listed on Edmund's site. Also, according to the diagram on Edmund's site there are six elements in three groups. Here's the link:

http://www.edmundopt...?productid=2074

By the way, I really like this eyepiece in my 4" f/10 refractor! f/10 is so very forgiving when it comes to aberrations. :grin:






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