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Thread: New and in need of help

  1. #1
    Linot00's Avatar
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    Default New and in need of help



    After getting lots of good advice on this forum, I am just days from ordering my new scope and mount: Explore Scientific 127mm ED Triplet APO Carbon

    And

    EXPLORE SCIENTIFIC TWILIGHT II ALT-AZ MOUNT W/ PIER EXTENSION

    I have been reading up on EPs and have noticed that the explore scientific EPs get good reviews. I am open to other suggestions too.


    I would like to order a few essential EPs with the scope. An EP or 2 with a wide fov and low mag good for OCs, M31 and M42. And 1-2 EPs with high mag for the planets.

    Am I right to assume that 250X would be about the highest mag I should use on my scope?

  2. #2
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    Default Re: New and in need of help

    Sorry don't mean to digress but why did you decide on an alt/az mount?
    Scopes: Orion 130mm APO Triplet, Orion 8" f4 astrograph, 10" RC Mount: Celestron CGX-L Guiding: Orion 60mm f4 scope, Starlight Loadstar, PHD2 software - Cams: Planetary: ASI120mc, DSO:Atik 383L+, SGPsoftware Processing : Regisax, Deep Sky Stacker, Star Tools, Pixinsight Assistant: One very large cat
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  3. #3
    Linot00's Avatar
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    Default Re: New and in need of help

    I won't be using the scope for any serious AP and I need an easy and quick grab and go setup. I have trees around my place that block my view so I have to move the scope around a lot. Also, during the summer months when the temps are nice it doesn't get really dark. When it does get dark (fall to spring) the nights are quite cold and I don't want to spend time aligning the mount every time I move it.
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    Default Re: New and in need of help

    Fair enough just wanted to make sure.

    Here you go, this of course is just a rule of thumb thing.

    Telescope Power Calculators

    You may also consider getting like a 32 and 25 and a barlow
    Scopes: Orion 130mm APO Triplet, Orion 8" f4 astrograph, 10" RC Mount: Celestron CGX-L Guiding: Orion 60mm f4 scope, Starlight Loadstar, PHD2 software - Cams: Planetary: ASI120mc, DSO:Atik 383L+, SGPsoftware Processing : Regisax, Deep Sky Stacker, Star Tools, Pixinsight Assistant: One very large cat
    ~ Put your money where your mount is ~


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    Default Re: New and in need of help

    Quote Originally Posted by Linot00 View Post
    I would like to order a few essential EPs with the scope. An EP or 2 with a wide fov and low mag good for OCs, M31 and M42. And 1-2 EPs with high mag for the planets.

    Am I right to assume that 250X would be about the highest mag I should use on my scope?
    You will very rarely be able to use 250x. More often, you will find that you can't go much above 127x.

    Your useable range will be from 8mm to 56mm focal length. You may want to get something near each end of the range: a wide angle of perhaps 45mm for DSO hunting (as well as for impressing the heck out of new observers), and an 8mm for planetary observing. Fill in the in-between values as budget permits.

    I have no direct experience with them, but the ES eyepieces have a good reputation.

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    pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
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    .

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    Default Re: New and in need of help

    Oops! I misread and thought you stated Twilight I mount. But anyhoo, I hear great things about the Twilight II also. I want one.
    Last edited by SpyderwerX; 05-18-2016 at 11:35 PM. Reason: remove useless information
    ~Frankie~ My mind: Always on...Slightly off.
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    Default Re: New and in need of help

    Don't know your budget but here's my recommendation. As you can tell from my sig line I love ES eyepieces. My suggestion for your 127APO would be: in ES 82° 2" eyepieces the 24mm and 18mm plus a focal extender/barlow. That would give you 24mm, 18mm, 12mm, and 9mm 82° FOV eyepieces. For 68° 1.25" ES eyepieces I'd go with the 24mm and 16mm plus a focal extender/barlow. That would give you 24mm, 16mm, 12mm, and 8mm 68° FOV eyepieces. If you want a lower cost good eyepiece look at the Paradigm Dual ED/Starguider Dual ED eyepieces (they are made with several different names on them). I have 5 of them and they are excellent 60° eyepieces.
    Johnny
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    Meade LS 8 F/10 ACF, Celestron C9.25 F/10 Starbright XLT
    ES 102mm F/7 Triplet APO, TS 130mm F/7 Triplet APO
    Lunt LS50THa B600 Solar Telescope, Eyepieces: 14 - ES 68° & 82°,
    5 - Paradigm Dual ED, 4 - UO Super ABBE Orthos,5 - TV Delos

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    Default Re: New and in need of help

    Lots of questions (sorry):

    Does this mean that 2" EPs have a 82 degree fov and 1,25" EPs have a 68 degree fov?

    My scope can take both sizes?

    What is the advantage of having the same EPs (24mm) at different fovs? Isn't it better just to get the one 24mm with the largest fov?

    Keith: you recommended: a wide angle of perhaps 45mm for DSO hunting. Do all 45mm EPs have a wide angle, or do I need to make sure it is a 2" 45mm EP?

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    Linot00's Avatar
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    Default Re: New and in need of help

    I found some great sites that have helped me understand EPs better. I thought it would be nice to share them here:
    http://www.12dstring.me.uk/foveyepiece.php?object=moon

    https://starizona.com/acb/basics/equip_eyepieces.aspx
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    Default Re: New and in need of help

    I'm not much help with eyepiece selection because my first criteria is long eye relief for use with my eyeglasses. Many others here are much more experienced and knowledgeable than I am, at any rate.

    I did want to say, however, that I think you'll love that scope and mount combination. I have the white-tube version of the 127ED on a Twilight II. Just as you described, I move my mount around to chase targets around trees - sometimes two or three times in a session. With a carbon fiber tube it'll just be that much easier.
    -Jay

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    : Obsession 15" f4.5; - ES 127ED
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