FreeLists / az-observing / [AZ-Observing] Re: Eyepiece religions

["Steve Coe" <stevecoe@xxxxxxxxx>]

Brian, et al;

I would seem that the makers of eyepieces want it that way.  I don't know
enough of the science of optics to speak too much about using an optical
bench.  But, in the era of the digital SLR camera could not a knowledgeable
person aim the eyepieces at a flat sheet of graph paper, take an image and
learn quite a bit from that image?

Just thinking out loud;
Steve Coe


-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Brian Skiff
Sent: Wednesday, April 16, 2008 4:06 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Eyepiece religions

     It's too bad the marketplace has made it difficult to 
determine actual facts about the eyepiece designs as actually sold,
so as to allow the discussion to be brought into the realm of
quantitative comparison rather than "religion".  The US magazines
(at least) provide no such information, and without a pretty good
optical-bench set-up, it would be a lot of work (and expense)
to reverse-engineer the commerical products.  Maybe some patent
searches would turn up actual specs you could run into an
optical-design program to yield details about image quality,
color aberrations, field curvature, distortion, etc.  I know this
was done for the original Nagler design (it was in an issue of
'Telescope Making' back in the 80s), but what about the many 
newer styles that have come out since then?


\Brian
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