Re: 2" 90° Apparent Field Eyepieces Announced

From: Richard (rander3127_at_rogers.com)
Date: 06/30/04 

Date: 30 Jun 2004 14:14:56 -0700

shneor@my-deja.com (Shneor Sherman) wrote in message news:<9dedb1fb.0406300643.2e10efd6@posting.google.com>...
> jonisaacs@aol.com (Jon Isaacs) wrote in message news:<20040629175818.11708.00000633@mb-m11.aol.com>...
> > >My experience with Burgess has been excellent value for the money. But
> > >I do wonder about the optical characteristics of this eyepiece.
> > >
> > >Clear skies,
> > >Shneor Sherman
> >
> > Probably best to take the wait and see attitude if something isn't currently
> > yet available. Burgess Optical has been somewhat optimistic in the past about
> > delivery dates...
> >
> > Jon
>
> Here's some more info from Bill Burgess: It's a 7-element design, all
> ED glass,"broadband multicoatings on all air-to-glass surfaces", and
> pinpoint stars to the edge down to f/3.5. Availability is at least 60
> days out.
>
> The part about pinpoint stars to the edge of a 90° apparent field 29mm
> eyepiece sounds very attractive. Maybe some of our eyepiece design
> mavens can tell us why this is either impossible or comes at the price
> of field curvature, loss of contrast or some other desirable optical
> characteristic. Or not.
 
So, all you have to wonder about are:
-distortion
-lateral colour
Like most widefields.
-Rich

-Rich

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