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  1. #1
    ddfurlow1s's Avatar
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    Default need a cheap deep space eyepiece



    can someone recommend an okay wide field low mag eyepiece for a hundred dollars or less
    Thanks

    btw, i just got my scope yesterday xt8i so my fl is 1200, again thanks!

  2. #2
    JuanM's Avatar
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    Default

    Agena Astro offers their 2" SWA (70 degrees aFOV) for 80-85 $ in 32mm and 38mm

    Eyepieces

    Scope:
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    XT8" Intelliscope 203/1200 f/5.9.
    Binos: Celestron SkyMaster 15x70. EPs(1.25"): Baader Hyperion 31mm aspheric, Baader Hyperion 8-24mm Mark III zoom, Orion SP 25&10mm, GSO 2.5x APO
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  3. #3
    kencrowder's Avatar
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    Default

    Look at "super wide" eps. They are probably all made by the same company, GSO. OPT has their brand on theirs.

  4. #4
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    Default

    The closest I can come for you would be the 30mm GSO SuperView: GSO 2" SuperView Eyepiece - 30mm

    It'll get you a decent 68 degree AFOV for $70 with good eye relief and with very good performance over almost the entire FOV for that telescope.

    I can't think of anything else in that price range which will compete with it other than maybe JuanM's mention of the 38mm SWA (might make a good choice if you are quite young).

    But that's not a very wide FOV in an era when Explore Scientific is working on putting a 120 degree eyepiece on the market.

    You might be tempted to go with the 42mm GSO SuperView instead, but I think that would be a mistake. Even if you are quite young you would probably be pushing the limits a little hard.

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  6. #5
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    Default

    Good point about exit pupils, OleCuss !

    I've checked the numbers and, if I'm not wrong, the 38mm will be at the limit of minimum magnification of that XT8i and some folks have reported a dark spot in the center of the eyepiece as a reflection of the secondary mirror's obstruction when approaching lower mag values.

    Moreover, it will give 6.4mm of exit pupil... Just for eyes under about 35 years old...

    The 32mm will possibly be a safer bet, with 5.4mm of exit pupil and 38x magnification.

    Scope:
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  8. #6
    sdtopensied's Avatar
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    Default

    Check out russell-optics dot com. Gary Russell makes excellent eyepieces at reasonable prices.

    -Steve
    Explore Scientific ED 127 Apochromatic Triplet Refractor
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    Default

    Quote Originally Posted by sdtopensied View Post
    Check out russell-optics dot com. Gary Russell makes excellent eyepieces at reasonable prices.

    -Steve
    Do you like those Konigs pretty well? I'd not gotten the impression that the Konig was all that great a design. Not bad, but not all that great.

    I do find his descriptions of those Konigs as being "Super Wide" or "Ultra Wide" angle as rather amusing. . .

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  10. #8
    jerryTheC's Avatar
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    Default

    Most of the 2" barrel 30mm or so eyepieces do a pretty good job - it just depends on how wide an apparent field of view you want to go for. You can get budget 80 degree or so models that will be fine over most of the field and distort a bit at the edges in faster scopes, or pay more for a premium design that works better in faster scopes. Or you can go for a smaller AFOV design that will probably cope better at the edges but not show as much...

    It's hard to make a bad long focal length eyepiece with a standard AFOV - you only start to see problems when you move to ultrawides, and even then any issues tend to be in the extra bit round the edge - although f6 is probably starting to get a bit more demanding than slower scopes. (I'm thinking of the 80 degree AFOV 30mm moonfish budget eyepiece here - that had some slight distortion at the edges at f6.5 and severe distortion over a larger area at f4 - but the center was still fine, and at least you could tell that something was there even with the heavy distortion - so the wider field still helped for finding things.)

  11. #9
    ddfurlow1s's Avatar
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    Default

    i ordered the gso 30mm from agena astro.
    thanks.

  12. #10
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    Default

    Quote Originally Posted by OleCuss View Post
    Do you like those Konigs pretty well? I'd not gotten the impression that the Konig was all that great a design. Not bad, but not all that great.

    I do find his descriptions of those Konigs as being "Super Wide" or "Ultra Wide" angle as rather amusing. . .
    I like them. It should be noted that they're good eyepieces for the money. If youre the type of person who can drop $600 on TV Panoptic, you'll be disappointed. But they are definitely wide field eyepieces. When I'm observing the sword of Orion with my 12" Dob, I can see NGC 1975 to NGC 1980 and everything in between with only the edge distortion you would expect from a Newtonian.

    -Steve
    Explore Scientific ED 127 Apochromatic Triplet Refractor
    Celestron CGEM

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