Question about Meade ETX-125EC (500 x 127mm) Telescope

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Etx cant focus

Etx 125 wont focus when flipping between eyepiece and lpi

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  • jac wilson Jan 11, 2009

    use the par focal ring


  • jac wilson Jan 11, 2009

    psrfocal ring

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The LPI camera will HIGHLY magnify the image-- about like a 6mm -8mm eyepiece-- tiny adjustments are needed to focus. You can buy a .5 or .3 focal reducer which will widen the field of view and make it easier to focus--

On my LX90 --- it takes about 20 TURNS of the focus knob to go between the eyepiece view and the camera view!

Posted on Jan 13, 2009

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1 Answer

How do i convert my 1.25 to a 2in so i can use the meade 56mm 2in eyepiece?


The ETX90 may not have enough back focus for a 1.25 to 2 inch adapter. You will need 1.6 in extra focus. (Try putting a eyepiece barely in the holder and see if you can focus CAREFULLY!) a 56mm eyepiece will seriously vignette since the opening of the scope is only 1.25 inch so do not expect a wide field.
Link below is for an adapter
http://agenaastro.com/blue-fireball-1-25-2-eyepiece-adapter.html

Jan 01, 2013 | Meade 07178-02, Eyepiece Super Plossl 56...

1 Answer

Telescope doesn't seem to work


This issue will be extremely hard to diagnose over the net but I'll give it a try. This is from Meade. The link to the online manual is below: http://www.meade.com/manuals/etx90ec/index.html Unable to see an image through the eyepiece:
  • Confirm that the lens cover has been removed from the telescope.
  • Confirm that the flip-mirror control (16, Fig. 1) is in the "up" position if using the eyepiece holder (4, Fig. 1) so that light is directed to the eyepiece (1, Fig. 1). Confirm that the flip-mirror control is in the "down" position if using the #932 Erecting Prism or doing photography with the ETX-90EC (see Telescope Controls and PHOTOGRAPHY WITH THE ETX-90EC).
It sounds like you are correct about a mechanical issue with the knob that moves the mirror. If you need a quick fix try your local camera repair or watch repair shop as the are familiar with intricate parts. The camera shop would be preferable as they know optics. Otherwise you could ship it to me and I could repair it fro you depending on the availibility of parts if parts were needed. Check my picture for my site address and get contact info there for more information.

Jan 05, 2008 | Optics

1 Answer

Meade ETX-90EC . i cant see through the telescope at all and the focus doesn't work at all. their are sounds if pieces "clanking" inside when it is adjusted into view


The flip mirror has fallen off inside the scope. This must be returned to Meade for repair. Here is their customer service phone number:

http://www.meade.com/support/index.html

Sep 12, 2011 | Meade ETX-90EC (325 x 90mm) Telescope

1 Answer

I have an older model meade etx astro telescope i see nothing but black when looking through my telescope..the lense cover is off...the mirror is in the up position like it should be....its nothing but...


Can you see Light through it during the day time? If you can nothing is wrong. Put the eyepiece with the largest number written on it into the TOP and try focusing on a distant object during the day time.

Turn the focus knob until you get a sharp image.

Feb 26, 2011 | Meade ETX-60 AT Telescope

1 Answer

When I look through the lense everything is just black


Take the scope outside during the day time. Put the eyepiece with the largest number written on it into the TOP diagonal. There is a "flip" switch on the back that changes between the rear photo port to the TOP eyepiece port.

Flip it one way or the other until you can see light through the TOP eyepiece. Practice focusing on a distant object during the day time.

Here is the manual:
http://www.meade.com/manuals/TelescopeManuals/ETXtelescopes/ETX-90%20w-autostar%20man.pdf

Dec 15, 2010 | Meade ETX-90EC (325 x 90mm) Telescope

1 Answer

Just got a Meade ETX 90 and cannot see anything thru the eyepiece. I've tried the focus screw, lens covers are off, and flip switch is in correct position. Anyone know the answer?


Put the eyepiece with the largest number written on it into the TOP of the scope eyepiece holder.

Practice focusing on a distant object during the daytime. It may take several turns of the focuser know.

Also check the TINY setscrew on the side of the focuser knob. It may be loose and need tightening so it will GRIP the focuser shaft.

Aug 19, 2010 | Meade ETX90AT Maksutov Telescope with UHTC...

1 Answer

Can't focus my meade etx-125. have turned focusing control more than 80x in both directions. Is there an stop on the focusing system. Originally had the electric focusing system on the scope couldn't focus...


yup there is a mechanical stop to prevent you from cracking the mirror by retracting or extending it too far.. once you break the pin off it needs to go to the factory for dis-assembly as they have to remove the primary to get to it and realign it my 105 did same thing....word of advise use a cable extender for focus not an electric focuser they fail to tell you that it can over run the built in stops making your scope useless...i may be mistaken but i believe the max turns is 25 or about for end to end focusing adjustment on the 125

Sep 28, 2009 | Meade ETX-125EC (500 x 127mm) Telescope

1 Answer

Can't focus on anything at all


Here is the manual-- read it cover to cover--
http://www.meade.com/manuals/TelescopeManuals/ETXtelescopes/ETX-90%20w-autostar%20man.pdf

1. Take off the lens cap

2. Put your lowest magnification eyepiece into the telescope on the TOP eyepiece port-- there is a lever on the side which rotates the diagonal mirror between the top and rear ports --- can you see light through the telescope? If not turn the lever.

3. During the day practice focusing on a distant object at least 100 yards away-- the image will be upside down -- this is not a problem-- no UP or Down in space.!

4. The lowest magnification eyepiece is the one with the LARGEST number on it.

Jan 02, 2009 | Meade ETX-125EC (500 x 127mm) Telescope

1 Answer

ETX 125 Loose image when focusing


The ETX family (and other Meade LX telescopes), use a moving mirror system for focus. The focus knob moves the main mirror in and out. For smooth operation, there is some slack on the central tube that allows the mirror to rock slightly as it moves. That is a normal condition, and the movement is magnified, the greater the magnification of the eyepiece.

Jun 15, 2008 | Meade ETX-125EC (500 x 127mm) Telescope

1 Answer

ETX-90 Focus


I suggest trying a different eyepiece first to see if that's the problem. Otherwise, if it was moved without adequate protection, there is a chance the mirror was shifted or damaged. A damaged mirror can't really be fixed since it's specs are very rigid. If it turns out to be a problem with the mirror the best thing to do is find an expert on telescope mirrors to try and fix the problem.

Nov 12, 2007 | Meade ETX-90 (48x90 mm)

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