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Thread: Can new telescopes collumation be poor?

  1. #1
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    Default Can new telescopes collumation be poor?



    Hi, i finally purchased Nexstar 130 slt..But i want to know that does telescope comes with normal collumation? Because it can drop at cargo..Or it can hit anywhere...I bought from amazon..Can it come with poor collumation? Does it frequently happens?

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    Default Re: Can new telescopes collumation be poor?

    A Newtonian telescope will almost always require collimation when you first receive it. It will have to be done from time-to-time thereafter as well.
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    Default Re: Can new telescopes collumation be poor?

    My scope needed tweaking when I received it. Not loads, but enough.
    Mike
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    Default Re: Can new telescopes collumation be poor?

    Hey Kaganuzun--Considering the Handling Practices used these days its a wonder that anything that has Multiple parts doesn't wind up at its final destination in Multiple Pieces-A True Testament to Modern Packing Techniques--It must be a Science----The Nice thing about the 130SLT is that you don't need a Laser to Collimate it,A simple inexpensive Cheshire eyepiece well work--Because of the Short Length--
    --I've read were all you need is the Cap off of a Film Canister{Evidently it's just the Right Diameter}with a 1/16th hole drilled Right in the Center---Then just install cap on the Focuser--Remove the Scope Cap--Point Scope at a light source or if that is too bright a Light colored wall and then while looking through the 1/16th hole Center everything up---When properly Collimated the Primary and its Center mark will be Centered in the Secondary that is Centered in the 1/16th hole being viewed through---This process Works with Fast F5 Scopes like the 130SLT,But not Slow Newtonian's as their Mirrors don't run truly Centered-ZX
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    Default Re: Can new telescopes collumation be poor?

    It is a good practice to check collimation when received, and each time you take it out to observe. Once you collimate it initially, it should usually only require a minor adjustment (if any at all) each time you take it out. Just moving them back and forth from the house to your observing position can cause them to shift slightly out of collimation, so its a good habit to have of checking them each time you deploy.
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    Default Re: Can new telescopes collumation be poor?

    I recently got my Orion 130ST, shipped to my home via UPS. When it arrived, the primary was surprisingly still reasonably collimated, and I could get decent views with it out of the box. A bit more careful study led me to realize the secondary was off alignment (less important, but still worth a tweak), and after tweaking that, I had to redo the primary.

    Collimation is just a fact of reflector life. Watch some videos on it, and don't be afraid to screw it up, you'll get the hang of it. Just remember that the screws are adjusting a glass mirror, don't crank em really hard, loosen the opposite screws if it gets tight.
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    Default Re: Can new telescopes collumation be poor?

    thanks for everyone!

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    Default Re: Can new telescopes collumation be poor?

    Best to get familiar with collimation as it needs to be tweaked from time to time. If you are careful when transporting the scope in the car and keep from any major jarring it should hold collimation just fine.
    In my experience the secondary mirror usually stays put its the primary that can be knocked out of alignment and if it does its just a minor tweak that takes maybe 15 seconds. Starting out you can get the impression that collimation is a pain in the butt and really hard but its really not IMO, i guess it may depend on the person though...
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    Default Re: Can new telescopes collumation be poor?

    Not unusual at all.... my scope can get knocked off collimation just driving it around in the car backseat. Usually you need to tweak the collimation just about every time you setup.

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    Default Re: Can new telescopes collumation be poor?

    The factory pre-collimates the scopes... but it doesn't matter. Any vibration, temperature changes, etc. will throw off the collimation. The mere act of shipping the scope from the manufacturer to the distributor, to the retailer, to you is enough bumping around that the scope needs to be re-collimated once you receive it.

    Collimations is somewhere frequently done with newtonian type reflectors... a little less so with schmidt-cassegrain reflectors, and almost never with maksutov-cassegrain reflectors or with refractors (most mak-cass and refractor scopes have no customer collimation capability anyway.)

    It's not difficult to do and definitely worth learning. A laser collimation tool (usually $50-70) really simplifies the task.
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