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Posts Made By: William Chang

March 17, 2005 05:14 AM Forum: Binoviewers

Eyepiece confusion

Posted By William Chang
I don't have the UO HD but I do have a pair of "Circle V" Celestron-labelled 18mm Ortho -- and they are wonderful, much better than 18mm Ultima. Don't know why nobody makes a 15mm Ortho.

March 18, 2005 09:53 PM Forum: Equipment Talk

newt with paracorr vs mak newt

Posted By William Chang
A related comparo would be with a Schmidt Newt, with or without a Paracorr (though it is likely faster).

For example 6" f/6 MN vs f/5 SN + Paracorr, 10" MN vs f/4 SN + Paracorr.

March 20, 2005 03:52 AM Forum: Eyepieces

Lightweight 2" wide field EP?

Posted By William Chang
Thank you all for the great suggestions!

Yes each of these should knock 1/2 pound off the Borg compared to 32WF. The 4" OTA with turret/diagonal but no EP is just over 3 lb. I hope to piggyback the Borg on a 6" f/15 Mak on the NexStar 8 mount...

-- William

March 25, 2005 03:26 AM Forum: Equipment Talk

Re: Best method of international shipping?

Posted By William Chang
Kent Kramer said:

USPS Global EMS

Kent

Seconded.

IMO if it isn't worth shipping EMS it isn't worth shipping internationally.

March 26, 2005 01:52 AM Forum: Eyepieces

What good is 60° FOV if it is not clear?

Posted By William Chang

I think we, as a group, should not encourage manufacturers to manipulate specs without regard to quality. Most people don't know/hear the nuanced trade-offs that we debate back-and-forth, and will buy on spec. In this case, "Increase the fieldstop and people will buy it." We need to hold manufacturers accountable.

Audio industry did very well with "total harmonic distortion" etc. Not that the spec was useless, but it gave the manufacturers a way to drive demand by marketing a spec beyond its usefulness.

We run the same risk.


-- William (Saratoga, CA)

April 14, 2005 04:10 AM Forum: Equipment Talk

Laser-Pointer Go-To

Posted By William Chang
Yes this comes up every few months it seems. (You can search "follow the little goto".)

Ideally the goto scope should be really tiny, at most a NexStar GT. Maybe someone will one day make a miniature scope whose "OTA" is the laser.

One thing to watch out for: a slewing laser can be dangerous if left on. A remote-controlled switch would be handy.

-- William

April 15, 2005 02:20 AM Forum: Mounts

Nexstar 80wa

Posted By William Chang
Jim, did you use a Baader dovetail adaptor, or rolled your own?

I seem to remember reading the N114GT has a blind spot at zenith... does it?

I have an N8/Ray's Bracket/Intes Micro 615 Mak setup, but if I come upon a good cheap GT I'd mount my 4lb Borg 100 Achro that way too.

-- William

April 18, 2005 12:33 AM Forum: Home Observatories

OBO

Posted By William Chang
Wow, could you write up a short "spec" or is everything in AA-42? Thanks, -- William

April 18, 2005 05:09 AM Forum: Pictures of Me and My Telescope and........

6" F/15 Folded Refractor

Posted By William Chang
Alan, does the EP ever end up in an awkward position, as the OTA turns about the RA axis? Any chance of using a binoviewer?

A close-up of the focuser assembly would be great. Thanks, -- William (D&G waiting to be folded...)

May 4, 2005 05:21 PM Forum: Equipment Talk

Naglers, telescopes, and selling

Posted By William Chang
Chris, my suggestion is for you to sell the EPs and accessories first, individually. They are much easier to "move" (and replace), and hopefully the cash will buy you some time. If you still must sell the scope, list it and be patient.

Best of luck, -- William

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