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Thread: My New Planetary Eyepiece

  1. #1
    JPAG's Avatar
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    Default My New Planetary Eyepiece



    Hello again.

    I have a new planetary eyepice:

    Omegon Cronus WA 4 mm 1,25"
    Omegon-Cronus-WA-4-mm-1-25-.jpg

    In my 150/900 newtonian gives 225x magnification.
    The image is very sharp and contrasted. In Jupiter I can clearly see festoons, rills, etc. , but only in the twilight!
    When the night falls, the image is not so good.
    Why? Does the eyepiece is defective?

    I shall be very grateful if you answer me.
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    TS (GSO) 150/900 Newtonian Telescope; SkyWatcher 130/900 Newtonian Telescope; KONEX 10x50 Binoculars
    Omegon Serie LE 5mm 1.25" EyePiece; Skywatcher Super MA 10mm 1.25" Eyepiece; Skywatcher Super MA 25mm 1,25" Eyepiece
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  2. #2
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    Default Re: My New Planetary Eyepiece

    jupiter will appear brighter as the background gets darker. Maybe try a filter next time to see if it helps. Other than that maybe a bit of moisture on the eyepiece or mirror?
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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
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    Default Re: My New Planetary Eyepiece

    Agree with Gabrielle. Too much contrast when full dark falls. You might try leaving an outdoor light on to keep you from becoming fully dark adapted.

    And, the longer you watch Jupiter, the more details begin to emerge as your eyes adjust to the brightness. A variable polarizing filter can help too.
    frazmataz, Leveye, 10538 and 3 others like this.
    Bryan

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    Default Re: My New Planetary Eyepiece

    Try wearing sun glasses... If that works, then a variable polarizer would help.


    Scott
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    Default Re: My New Planetary Eyepiece

    Many thanks to all of you who answered me, I will follow your advice.
    TS (GSO) 150/900 Newtonian Telescope; SkyWatcher 130/900 Newtonian Telescope; KONEX 10x50 Binoculars
    Omegon Serie LE 5mm 1.25" EyePiece; Skywatcher Super MA 10mm 1.25" Eyepiece; Skywatcher Super MA 25mm 1,25" Eyepiece
    Skywatcher 1.25" 2X Barlow lens

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    Default Re: My New Planetary Eyepiece

    Jupiter will also be clearest when it is overhead. You will lose clarity as it descends and your viewing angle passes through many more miles of atmosphere. How high is it at twilight, and how high is it when you look again later, after dark?

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    Default Re: My New Planetary Eyepiece

    Actually one of the best times is at dusk while they are rising, they have good contrast against the lighter background which makes getting fine detail easier. By the time it gets to zenith your eye is usually adapted to the brightness and as it is setting the atmosphere has normally stabilized fairly well so you do not really lose much clarity.
    If just viewing planets for the evening I suggest leaving a light on so your eye does not become fully dark adapted.
    10538 likes this.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

 

 

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