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  1. #1
    PolakPola's Avatar
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    Post Eyepiece question



    Hi,
    so my Meade DS-2114AT-TC came with 2 eyepieces, 9mm and 25mm. Should i get more, what size? And what other accessories do you guys recommend for my scope? barlow? filters?

    Polak

  2. #2
    sxinias's Avatar
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    Enjoy your autostar telescope. It can show you the universe.

    Actually I don't think that you need to buy much at all.

    Filters: Perhaps a moon filter but really filters don't work that well with small aperture telescopes as they attenuate the small amount of light that your scope gathers. For large telescopes this is not a problem. You are better off, just saving the money filters cost for the day when you want to purchase a larger aperture telescope or one with better optics than the one you now have.

    Eyepieces. You have serveral optioins to go with your 25 and 9 mm eyepieces.

    1. Purchase a 2x barlow, you will have the following capability:

    a. 40x (25mm eyepiece)
    b. 80x (25mm eyepiece; 2x barlow)
    c. 111x (9mm eyepiece)
    d. 222x (9mm eyepiece;2x barlow Note: you will seldom if ever be able to use this combination as the best your scope can realistically do is around 160-180x)

    2. Purchase a 12 mm eyepiece and an 6 mm eyepiece. you will have the following capability which ought to pretty much cover your scope's range:
    a. 40x (25mm eyepiece)
    b. 83x (12 mm eyepiece)
    c. 111x (9mm eyepiece)
    d. 166x (6mm eyepiece; Note: you will be able to use the 6 mm eyepiece only under excellent seeing conditions; actually a 7 mm eyepiece at 143x will probably proove far more useful)

    From the above you can see that a barlow really does you no good and that a 12 mm eyepiece should be first on your list followed by either a 7 or 6 mm eyepiece.

    Some people may say to get the skywatcher or celestron 8-24mm zoom eyepiece which cost $80 or so. One of these zoom eyepieces with your existing 25 mm eyepiece will give you a viewing range between 40x and 125x which matches your scope's capabilities very well under average seeing conditions. The nights that you can use a 6 or 7 mm eyepiece are few and on these rare nights you will miss the magnification a 6 or 7 mm provides only if you want to look at Jupiter or Saturn.

    In general, stay with inexpensive but good eyepieces such as the Meade 4000 series. It makes little sense to spend a lot of money on expensive eyepieces as you can get a greater improvement using the money to purchase a larger telescope.

    You may want a digital camera adapter so you can photograph the moon, planets, etc.

    I got tired making the battery companies rich, so I made an adapter and use an automotive jump start battery for my DS2090AT. Its easy to do if you have some basic knowledge of electrical circuits.

    Hope this helps you make your decision.
    Last edited by sxinias; 02-25-2010 at 05:51 PM.
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  3. The Following 4 Users Say Thank You to sxinias For This Useful Post:

    Dublin sky watch (03-01-2010),EricFD (02-25-2010),mike_crow (02-25-2010),PolakPola (02-25-2010)

  4. #3
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    Good advice from Sxinias. If you just got your scope, I think it's important to get to know what you have first before you start spending money on things you may never use. But if money is no issue..well then never mind. I think a 2x Barlow is a good starting point. Once you get used to viewing with the 2 EPs you have, plus the Barlow, you'll have a better idea of what you are looking for in a new EP. And as always, take time researching and asking questions before you buy.

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  6. #4
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    Default

    Thank you guys for the help. I will get a 2X barlow and a 6mm and 12mm eyepieces.
    Mike, i wish that money wouldn't be an issue... in these days i have to fight to get these things above... (wife) LOL

  7. #5
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    If you buy a 6 and 12 mm eyepiece, the 2x barlow is not needed.
    SXINIAS

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  8. #6
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    Smile

    Ok, i'll get the 2 eyepiece.

  9. #7
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    Default

    Good question PolakPola and great answer Sxinias.
    Thanks guys.
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    Default

    I got tired making the battery companies rich, so I made an adapter and use an automotive jump start battery for my DS2090AT. Its easy to do if you have some basic knowledge of electrical circuits.
    :-) I use a jump start battery for my telescope, too.
    For my Celestron 6se telescope, I actually use the jump start battery + rechargeable batteries so I can preserve allignment in case of rechargeable batteries go out.

    And I really agree with others opinion: don't spend a lot on accessories, just maybe a few books and a method (software of charts) to localize the targets.
    I very seldom use high magnification - the useful magnification limit depends on the telescope and the viewing conditions.
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