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

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Can't Focus I just bought a Made etx-125ec from a friend.  I locked onto a bright star and turn the focus to each extreme and cannot get the object in focus.  I was curious if it is possible for someone to damage the focus mechanism by turning it too far.

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  • jimmy179 May 11, 2010

    What kind of eyepiece are you using?

  • dtfix May 11, 2010

    Do you see any change in the image when you turn the focus knob?

    If so it may be worth trying a different eyepiece before trying to open up the optical tube.

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The focus screw can come out if run too far. Point it straight up, give the side of the optical tube some light 'thumps' and turn the focuser clockwise. You should be able to see the mirror moving backwards in the cell.

Posted on Jul 25, 2009

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HOW CAN I TAKE PICTURES OR VIDEO WITH MY ETX-125EC? WHAT DO I NEED TO DO THIS?


You can buy this device and take prime focus images using a small digital camera. Make sure the camera can take timed photos of up to 30 seconds long.

http://www.telescope.com/control/astrophotography/astrophotography-accessories/orion-steadypix-deluxe-camera-mount

Dec 10, 2010 | Meade ETX-125EC (500 x 127mm) Telescope

1 Answer

Can't focus using 5mm lens


TOO much magnification for that 3 inch telescope. The most you will get is about 120 power or so on perfect sky nights. Try a 10mm or 9 mm as your most powerful eyepiece.

50 times aperture is the maximum possible.

Jan 19, 2010 | Meade ETX-125EC (500 x 127mm) Telescope

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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


Unless you can find another "used broken" ETX of same model-- to get the focus off of-- your only recourse will be to send it back to Meade for repair--

Here is their customer service phone number-- and their manuals

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

http://www.meade.com/support/contact.html Contact number

Feb 10, 2009 | Meade ETX-125EC (500 x 127mm) Telescope

1 Answer

Etx cant focus


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!

Jan 11, 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

Can't get to focus.


I think that the focus shaft has become un-attached by turning too far. Try placing the telescope facing directly upwards and start turning the focus knob clockwise. A little vibration on the tube will help the mirror to settle downwards. This may get the threaded rod back into the knob.

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

1 Answer

Focusing problem


it could be the grub screw on the knob needs tightening. If it is loose, the knob will just turn but the shaft wont.

Dec 22, 2007 | Meade ETX-125EC (500 x 127mm) Telescope

1 Answer

Focus Issues


Try tightening the grub screw that fastens the knob onto the shft that it turns.

Better still, buy a flexible extended focusser which makes focussing much easier. Check on eBay for "Meade flexible focus"

Sep 27, 2007 | Meade Telescope

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