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  1. #1
    sneeds's Avatar
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    Default Purchasing help: 20 mm or 32 mm?



    Hello everyone,

    Well, it has been about a year since I bought my first telescope (Skywatcher Heritage 130p) and now I am thinking about an eyepiece addition. I mostly like to just 'find' objects, so I don't mind looking at fuzzies and smudges. Planets are ok and so are double stars, but they don't really do it for me. I like the deep space objects, and I like my small telescope and I am not looking for more aperture right now. I just want to get the most out of what I have. I am also in a massively light polluted area (Western Europe) and so even some bright objects are tricky to find. For example, sometimes I find M13 in Hercules difficult to find! But on other nights with better conditions, just being able to find and see the faint smudge for me is very rewarding.

    All that being said, I am looking for advice about buying an eyepiece. I have the stock 10 mm and 25 mm 'Super' eyepieces that came with the scope, and I also have a Skywatcher 8-24 zoom and a x2 barlow. So, what do you think the best purchase would be:

    1. GSO superview (70 deg wide-angle) 20 mm
    2. Celestron Omni 32 mm

    The 32 mm would give about 20x magnification, and the 20 mm would give about 33x. I already have the 24 mm on the zoom, giving about 27x. Will I see much of a difference between the zoom or super 25 mm and the 32 mm? I realize the upgrade from the 'Supers' to at least plossls should be noticeable, but how much? For the targets I am trying to see (Messiers and other easy NGCs), which magnification would you pick?

    I am also considering forgoing the pieces all together and getting Pennington's book - 'The year round Messier Marathon', which is supposed to be fantastic. I just want to give myself the chance to improve what I am seeing from the eyepieces I already have. Any advice you could give would be great! Especially about whether or not I will notice a difference with either of these eyepieces. Thanks,

    Sincerely,

    Jeff

  2. #2
    sneeds's Avatar
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    I forgot to mention, I already have the book "Turn left at Orion" which is excellent, but has less Messiers than Pennington's book. Also, for those not familiar with my telescope model, the focal length is 650 mm (f/5) with a 130 mm aperture. This might help a bit with any advice you might give. Thanks again!

    Sincerely,

    Jeff

  3. #3
    OleCuss's Avatar
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    Personally, I'm thinking the GSO SuperView. It should be a nice combination of reasonable magnification and a pretty good field of view.

    For a "hunter" I'd think that would be a very nice combination.

    I'd think that there would be enough star charts available on-line that getting the Pennington book for Messier objects probably wouldn't be worth forgoing the better eyepiece.

    FWIW
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  5. #4
    Joe Lalumia's Avatar
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    Not much of a different-- probably just notice a little bit wider field of view and lower power. You already own a zoom and several eyepieces and a barlow.
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  7. #5
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    Joe,

    Do you mean not much of a difference from what I have, or not much of a difference between the two? Thanks for your help,

    Jeff

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    Both-- a slightly larger field of view-- and lower magnification. What you have is probably very similar quality to what you plan to buy.

    With only minor differences-

    Personally I think the GSO eyepieces are a good buy, and good quality for the low price point. A lower power wider field would be useful for viewing extended objects like M45, M31 and others--
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  10. #7
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    I recently purchased one of these. This would be the optimum low power EP for your scope. It will show you the Pleiades in entirety.

    I also have a 30mm Siebert Ultra which I paid over $150 for, and which I bought especially for viewing the Pleiades with my Heritage 130. The performance of the 32mm above closely matches the Siebert. I highly recommend this EP!

    I don't think you really need a 20mm, as that is covered with your zoom, but then, I am not a big fan of wide angle EPs.
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  12. #8
    sneeds's Avatar
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    Hi WWPierre,

    I don't get it - it's not the usual Synta clone with the 57 FOV. And it is cheap. And it is a Plossl design which should be better than the MA design of the 'Supers'. Hmmm, shipped for free from S. Korea. I might have to give it a try!

    Jeff

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    Oh, one more thing WWPierre - did you have to pay any import charges in Canada for it? And do you remember how long roughly it took to ship? Thanks for all the help,

    Jeff

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    Quote Originally Posted by sneeds View Post
    Oh, one more thing WWPierre - did you have to pay any import charges in Canada for it? And do you remember how long roughly it took to ship? Thanks for all the help,

    Jeff
    No, it just came in the mail, and arrived in less than 2 weeks, even though we had a postal strike in the meantime.

    I haven't been able to find it re-branded anywhere.

    I corresponded with the vendor, and he told me he was selling it for a friend; a widow whose husband had dealt in astronomical equipment for institutions.
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