Re: UO HD orthoscopics, no different?

From: Bob Schmall (rschmall_at_wi.rr.com)
Date: 10/29/04 

Date: Fri, 29 Oct 2004 13:54:36 GMT

"RichA" <none@none.com> wrote in message
news:dhl3o01p9p6qvt4pudsnuoc25v2jh7dl4q@4ax.com...
> I'm pretty sure these eyepieces are simply the regular orthos
> (excellent eyepieces) with new packaging. If you look at this
> picture of the Antares orthos (simply a new flat-top version
> of their standard orthos) from Helix Mfg, you'll see they
> have the same undercutting as the new UO HD orthos. Only
> difference is the red versus green lettering. What they've
> done is gone from the old bevelled top to a flat top, added
> a rubber eye cup and undercut the barrel. Any optical difference
> compared to the "classic" orthos is likely not actually there.

This is pure uninformed speculation, and as such is unfair. See below.

> http://www.helix-mfg.com/orthoshires.jpg
>
> If anyone knows if they've done something new to the optics,
> it would be interesting to hear about it.

I've recently tested both the University Optics orthos, original and HD,
against a TV Radian and AP SPL, all in 12mm focal lengths. I kept the HD and
sold the others, not because it was orders of magnitude better, but because
it offered comparable performance at a much lower price. The HD was better
than the original orthos, IMHO, because the newer coatings reduced flare.
However, as I posted in another thread, I still consider either of the
orthos to be sleeper eyepieces.

Disclaimer: testing done with a 5" Mak-Newt of excellent quality by a
62-year old man with good eyesight (20/15 corrected) and no astigmatism.
YMMV considerably.

Bob

>

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