ETX-90 USER FEEDBACK
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Last updated: 26 June 2007

This page is for user comments and information specific to the Meade ETX-90RA (originally known as the "ETX Astro"), the ETX-90EC, and the ETX-90AT. Comments on accessories and feedback items appropriate to other ETX and DS models are posted on other pages. If you have any comments, suggestions, questions or answers to questions posed here, e-mail them to me and I'll post them. Please use an appropriate Subject Line on your message. Thanks.


Subject:	re: Something about the etx-90
Sent:	Friday, June 22, 2007 23:01:26
From:	richard seymour (rseymour@wolfenet.com)
The first deep space object i tried with my ETX90 was the Ring Nebula
(M57).  ... and it -was- a ring.  Small (with the 26mm), but a ring.

Most of the Messier objects look quite good in an ETX90,
even in city air (such as mine).

M42 is impressive.  M81 and M82 can be distinctly different.
(i use a 2x Barlow for the smaller targets).

have fun
--dick
Mike here: The first object I ever saw in a telescope was M57, the Ring Nebula, and that was through my new (at the time in 1962) Edmund 3" Newtonian telescope.  It was definitely a "smoke ring".
Subject:	Something about the etx-90
Sent:	Friday, June 22, 2007 09:29:49
From:	ggenkis (feynman@vivodinet.gr)
I tested my new etx-90 and i am satisfied.The only thing i wonder is how
with this telescope someone sees deep space objects (ex. andromeda
gal.).My conclution is that its suitable only for planets.And i tested
in a good sky with no noise at all.

Have you ever seen deep space objects with this piece and how?

For the beginning i bought the barlow and the 20mm and i am satisfied.

Goodbye.Thank you.
John , Greece.
Mike here: You can read my ETX-90 experiences on the Helpful Information: Buyer/New User Tips page. There are also many ETX-90 user reports on the Helpful Information: User Observations page. Bottom line: you can observe DSOs using the ETX-90. As with all small telescopes they will typically appear as "faint fuzzy blobs". But you will see shapes. Just don't expect to see color (except gray or faint green). Also, keep in mind that increasing the magnification will sometimes defeat the purpose as it spreads the light from the DSO over a larger area, making it appear even fainter. As to M31, it is so large that you will typically just be seeing its central region when viewed through a telescope.
Subject:	Etx 90 on Meade DS2100 mount
Sent:	Friday, June 22, 2007 03:31:39
From:	Giancarlo Mari (giancarlo.mari@gmail.com)
HI, i have an old ETX90 RA, and i found a Meade Dual-Axis Motorized
Telescope Mount , the same mount use on Meade DS2100, and i need to know
if i could replace my old fork mount, or adapt this mount to work on my
telescope, so i will have an Go-To telscope.
 
Thanks.
Mike here: There are some articles on mounting an ETX OTA on a DS mount on the Helpful Information: Telescope Tech Tips page.

And:

Thanks a lot!!!!!!!!!!!!!

Subject:	Re: I received my used etx-90ra from opt.
Sent:	Wednesday, June 13, 2007 05:13:06
From:	ggenkis (feynman@vivodinet.gr)
Thanks for the tips.

Although my etx stayed last night with the motor 'on' and 'no move'.

My quick conclution is the the motor doesnt work.And it seemed like new
when i opened the base.

I dont care so much because i was prepared for a manual telescope and
not for a go-to.

I realized that the mechanism seems simple.So whats going on.? The motor
got tired probably?

John, Greece.
Mike here: OK, so no movement AND no noise. But if you have inserted the batteries correctly and they are fresh and the motor does not turn on (you hear no noise from the base) then something has become disconnected or broken inside the base.

And:

Excuse me , inside the base where do you mean? In the space where we put
baterries and is the motor or the other part?
Mike here: Inside the base where the batteries go is the electronic circuit board and the motor and the wiring.

And:

OK! go it.
Thanks Mike.
I will definetely send you my first photos.
Bye.

Subject:	I received my used etx-90ra from opt.
Sent:	Tuesday, June 12, 2007 06:56:20
From:	ggenkis (feynman@vivodinet.gr)
I received my used etx-90ra from opt. A few hours before.

The telescope seems okey.Fine.

I downloaded the manual so i learned the functions in a few minutes. The
only thing i want to ask you is about the motor drive.I placed the
batteries.ok.(+,-).I placed the telescope in right potition.I turned it
'on', but i cant understand if it works ok.I didnt hear any at all noise
, and i thought that it moves so slowly that you cant check it
immediatelly , is that right?

So i left it for half an hour to see if it moves.But i am not sure.

Tell me please.
Thank you.
John Greece.
Mike here: The motor is very quiet on the old ETX-90RA and watching the tube move is worse than watching the hour hand on a clock move. It takes 24 hours for telescope to complete one rotation. But there are a couple of ways to verify it is tracking with the axis locked: 1. point the telescope into the polar aligned position and aim at a star; the star in the eyepiece should pretty much stay put (assuming you align on the North Celestial Pole). 2. aim at a terrestial object and look through the eyepiece; within a few seconds you should notice that the object has moved in the eyepiece. A third method (requiring some patience) is to just turn on the motor, lock the axis, notice where the telescope is pointed; come back an hour later and you should have noticed that the telescope is pointing 15 degrees away from where it was.

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Copyright © 2007 Michael L. Weasner / etx@me.com
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URL = http://www.weasner.com/etx/archive/jun07/90.html