Question about Meade ETX-125EC (500 x 127mm) Telescope
The shift is bad when i have an object in the center of field of view and then focus, the image will go way out to the outer edge and will hang up out there untill i turn the knob some more.When i turn the knob counter clockise it has the same tension all the way,But when i turn clockwise less tension and the knob easily can be wiggled up and down or side to side. yes i would like to fix myself. thanks.
The focus knob can have the play reduced. Turn counter-clockwise a turn or 2, then loosen the knob's set-screw and carefully turn clockwise until a little drag is felt. Then tighten the set-screw.
A further item that may pertain to image shift, especially at low powers, is that the baffle tube that the main mirror slides on, may be loose in the back housing. There have been reports of poor thread engagement due to poor tolerences. That tube can be re-tightened - just be careful not to strip the threads!.
Posted on Jun 20, 2008
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Posted on Jan 02, 2017
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