Question about Meade Polaris 285 (225 x 60mm) Telescope
I just bought the Meade 289 m telescope with all eye pieces: 25mm, 12.5mm and 4mm. No matter how i try to focus it will not focus on a targeted subject. I aimed it at the moon, an easy subject but to no avail. If i remove the eyepiece and look into the refractor I can see the subject but once I replace the eyepiece it becomes out of focus again. Please advise me.
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Posted on Jan 02, 2017
SOURCE: can't focus my telescope
If there is nothing on the objective lenses or eyepiece lenses then it most likely needs collimation. This is where you adjust the secondary mirror while viewing an out of focus star. You need stable sky conditions to do this.
There are most likely three small screws at the front of the telescope and these are what you use to adjust it. As one screw is loosened then another is tightened. Do this in very small increments. If you have your manual it should outline how to perform this. If not go to this web site: http://www.astrosurf.com/legault/collim.html. It will show examples of how objects look both in and out of collimation. There is a section further down the page for SCTs.
A very handy tool for this is to replace your screws with Bob's Knobs (http://www.bobsknobs.com/) . These replace the screws and allow you to adjust it by hand instead of a screwdriver.
The other focusing problem I've experience with my Celestron SCT is to have the focus knob loosen up and then slip as I turned it so that I could never focus with it.
Good luck and clear skies!
Posted on Mar 30, 2009
All of Meade's manuals are listed here--
Take it outside during the day time-- put the eyepiece with the LARGEST number written on it into the telescope--- this is the LOWEST magnification.
Point it at a distant object and practice focusing-- the moon should be your first night time object.
Posted on Jun 18, 2009
Sorry about Meade's responses, but their website has a download section for the telescope manuals - you may not find one that matches exactly, as they produce hundreds of models, but one that is close should suffice. As for eyepieces, there are several good vendors out there; Orion Telescopes, Meridian etc. Just check the barrel size; either .965" (Japanese standard) or 1.25" (American standard).
Posted on Aug 21, 2009
1 1/4 inch OD is a standard size for eyepieces. You should be able to buy eyepieces in other focal lengths at any shop that sells telescopes, or online. I found hundreds of them with a quick search on Amazon, some made by Meade.
Posted on Nov 04, 2010
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