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  1. #1
    UNICRON's Avatar
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    Default Celestron 130slt eye piece setup



    Hi guys!
    I'm new to both the forums and astronomy (kinda) I've just purchased my first scope, the celestron nexstar 130slt. Great scope, love it to bits. I do however have a few questions i would like to ask regarding eye pieces and the such.
    When i bought the scope i did get a 2x barlow with it, as well as an extension bar and t-ring for the 25mm eye piece. The barlow I got was threaded for the t-ring so i use the 9mm with that.
    According to my maths (as crap as that is) with my 2x barlow im getting a magnification of approx x124 with the 9mm and x52 with the 25mm. From what I'm reading the scope has a usefull mag of x300.
    I'm going to say that the supplied eye pieces with this scope are fairly ordinary as far as using the true power of this scope.
    I'm looking at getting some more eye pieces, maybe a 8-24mm zoom as well as a 3x barlow. Would these be good choices?
    I have some data for the scope, it maybe helpful in working out just how far i can take the eye piece setup.
    Aperture: 130mm
    F/L: 650mm
    Focal ratio: F5
    rayleigh criterion: 1.06 arc seconds
    Dawes Limit: .89 arc seconds
    Light gathering power: 345x unaided eye
    FOV (standard eye): 1.7deg
    Optical tube length: 21inch
    I do understand that this scope wont get me hubble like viewing (spewing) but I'm sure it can do alot better than what the standard eye pieces can deliver. Any recommedations? I live is australia so any ozzy info would also be great.
    Thanx for your help guys!

  2. #2
    sxinias's Avatar
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    Default

    Welcome to the Astronomy Forum and thanks for joining. The 300X useful magnification for your telescope is something that is seldom achievable due to the thick atmosphere we have to see through. As you increase your magnification, your image will become larger but it will also become dimmer and less defined. Typically 150x or there abouts will be reality. You have a 25 and 9 mm eyepiece as well as a 2x barlow. This is probably a good fit for you at the time. The 130SLT has a wide field of view and does very well for deep space objects requiring a wide field of view or a bright image.

    Hopefully someone who owns a 130SLT will jump in with more specifics.

    One thing if you have not already done so; tighten all he nuts and bolts on your tripod. This will make it a little more sturdy which will reduce vibration a little and also increase goto accuracy a little.
    SXINIAS

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  3. #3
    UNICRON's Avatar
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    Default

    Thanks for the warm welcome sxinias.
    OK, well that makes sense. Currently Saturn is very bright but is fairly small when viewed through the barlow+9mm. I can make out several moons as well which to me is quiet amazing considered its 1.5 billion kilometers away and I'm sitting in the back yard with a mirror stuck in a pipe XD.
    So that said, any zoom lense I buy (looking at a meade 4000 series) would just be for convinience sake rather than image enlargement or quality.

  4. #4
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    Default

    Welcome to the forum. As Joe said, super high magnification is hit or miss, usually miss. The atmosphere really gunks up our views. From what I have read the meade is a good zoom. I have never used one, but the baader hyperion zoom is the cadillac of the zooms. Albeit at 2-3 times the cost of the others.
    name: Derek

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  5. #5
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    Default

    Welcome to the forum.

    I actually plan on buying the Meade 8-24 very shortly for my daughter's 130SLT. It should be a fine piece to go with your telescope.

    The Hyperion Zoom is a better eyepiece but at almost double or triple the cost only you can determine how much better it is. Since that scope is a goto model you should be good with the Meade as it will keep whatever you're observing in the middle of the eyepiece where it's sharp.

    I hope this helps in your decision.

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    Default

    I had a 130 SLT..
    I did push the magnification on Saturn.. Problem is focusing very little room for error and the scope shakes terribly.
    I have the Celestron Zoom (because it has t-threads) For $55 it is real value.. very happy with performance compared to say a $100 EP kit. to cover the same range.
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  7. #7
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    Default

    I own a 130SLT. I'm new to astronomy, so take my advice at your own peril.

    I don't have any experience with the zoom type eyepieces, but from my reading around they seem to be popular and handy for determining what eyepieces you may want to add in the future.

    I find myself using eyepieces in the 9mm to 18mm range for a large part of my observing. Right now my favorite eyepiece for crusing around the sky is my Explore Scientific 18mm. At 36X with an 82 degree AFOV it's just right for good views of a lot of the star clusters I've been viewing lately. I have a 4.7mm for high power viewing of planets, etc. I also have an 11mm that gets some use, but I usually go from 18mm to 9mm when I want a closer look becuase they are both 2" eyepieces and my 11mm is a 1.25". I'm wanting to add a 2" 14mm next, but I just bought a new scope so I'm broke right now.

    Most of my barlow use comes when I'm viewing planets like Saturn or Jupiter, or ocasionally I'll try it out on something just for kicks. Using my ES 4.7mm and barlow, I've bumped my magnification up to 277X and still got pretty good views at times. Not perfect, of course, but I was able to see the cloud bands on Jupiter and several of it's moons at 277X with no problems. Fogfire is right, focusing is difficult at high magnifications. Just use a light touch, change it ever so slightly, let it settle, repeat. Don't think I would bother going much beyond that with this scope, but It held up pretty well at 277X on the nights I used it. That would lead me to say I probably wouldn't bother with the 3X barlow, myself. I would spend the money on another eyepiece instead.

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    Default

    Thanx guys,
    Wow, so friendly! Good to find a great bunch of people. Ok well from whast every one is saying......lol >>> thats awsome!
    Back to the topic. so Really i cant go to wrong with a zoom for now. I can't justify spending $300 or more on a eye piece for this scope when I'm so new to the scene. The meade seems great from all review and not super dooper expensive so that will work for me just fine. I should also save some pennies for a good wide angle 2" maybe...

  9. #9
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    Let us know what you think of it when you get it.

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