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Thread: best eyepiece for the moon

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    Default best eyepiece for the moon



    I have a carton 80mm f15 refractor. What is the one eyepiece that I could use to get the best views of the moon. Money being no object eg The expensive TELEVUES to be included. Could this same eyepiece be used with a VIXEN VMC 110 MAK/CASS.

    THANKYOU FOR YOUR REPLIES

    Steve B

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    Default Re: best eyepiece for the moon

    Moon is one of a few targets where using zoom EP makes perfect sense. So, I would suggest a good quality zoom like Baader Mark IV. It will work great in both scopes.

    Baader 1.25" & 2" Hyperion Mark IV 8-24mm Zoom Eyepiece with 1.25" 2.25x Hyperion Barlow # HYP-ZMBAR 2454827
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    Default Re: best eyepiece for the moon

    Quote Originally Posted by Bigzmey View Post
    Moon is one of a few targets where using zoom EP makes perfect sense. So, I would suggest a good quality zoom like Baader Mark IV. It will work great in both scopes.

    Baader 1.25" & 2" Hyperion Mark IV 8-24mm Zoom Eyepiece with 1.25" 2.25x Hyperion Barlow # HYP-ZMBAR 2454827
    I was about to type almost the exact same thing!
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    Default Re: best eyepiece for the moon

    The Baader Mark IV zoom is quite nice. But if you want the best possible performance you need to have different focal lengths for the f15 refractor and for the ~f10 VMC (I have one also).

    To get the maximum amount of detail that is possible, that is accomplished at a 2mm exit pupil. So to get the best out of your Carton you can get a 2*15 = 30mm focal length. That is longer than is possible with the Baader zoom which tops out at 24mm. So in an f15 scope there might be nights when the Baader is a little too much magnification. For the VMC 110L you want an eyepiece that is 2*10 = 20mm in focal length.

    Now for the Moon I generally prefer Orthoscopics. Narrow field but utterly sharp and free from scattered light. The KK Fujiyama Orthoscopics are very good but the focal lengths are again not long enough for your f15!

    Another solution would be the Baader Classic Orthoscopics. That includes a 32mm Plossl and 18, 10, and 6mm Orthoscopics. It perfectly covers your range. It would be very rare that the 6mm would be usable in your f15 since that is less than a 0.5mm exit pupil but is just rarely usable (not very rarely) with the VMC.

    So I'd recommend a set of BCOs the 32, 18, and 12mm. They are about $87 apiece.

    Another alternative would be the Vixen NPL Plossls.

    https://www.vixenoptics.com/Vixen-Te...eces-s/115.htm

    They are really good performers and an economical solution. Again the optimum detail at f15 would be given by the 30mm and for the f10 would be the 20mm. They are in the $50-60 range sol you'll save a bundle compared to the zoom and can fill in as you like. I won't use a Plossl that is shorter than 10mm though because of eye relief. Shorter than that and I'd insist on an Orthoscopic since Orthos have better eye relief than Plossls.
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    Default Re: best eyepiece for the moon

    Quote Originally Posted by not_Fritz_Argelander View Post
    The Baader Mark IV zoom is quite nice. But if you want the best possible performance you need to have different focal lengths for the f15 refractor and for the ~f10 VMC (I have one also).

    To get the maximum amount of detail that is possible, that is accomplished at a 2mm exit pupil. So to get the best out of your Carton you can get a 2*15 = 30mm focal length. That is longer than is possible with the Baader zoom which tops out at 24mm. So in an f15 scope there might be nights when the Baader is a little too much magnification. For the VMC 110L you want an eyepiece that is 2*10 = 20mm in focal length.

    Now for the Moon I generally prefer Orthoscopics. Narrow field but utterly sharp and free from scattered light. The KK Fujiyama Orthoscopics are very good but the focal lengths are again not long enough for your f15!

    Another solution would be the Baader Classic Orthoscopics. That includes a 32mm Plossl and 18, 10, and 6mm Orthoscopics. It perfectly covers your range. It would be very rare that the 6mm would be usable in your f15 since that is less than a 0.5mm exit pupil but is just rarely usable (not very rarely) with the VMC.

    So I'd recommend a set of BCOs the 32, 18, and 12mm. They are about $87 apiece.

    Another alternative would be the Vixen NPL Plossls.

    https://www.vixenoptics.com/Vixen-Te...eces-s/115.htm

    They are really good performers and an economical solution. Again the optimum detail at f15 would be given by the 30mm and for the f10 would be the 20mm. They are in the $50-60 range sol you'll save a bundle compared to the zoom and can fill in as you like. I won't use a Plossl that is shorter than 10mm though because of eye relief. Shorter than that and I'd insist on an Orthoscopic since Orthos have better eye relief than Plossls.
    Ye, but he asked for one EP.

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    Default Re: best eyepiece for the moon

    Quote Originally Posted by Bigzmey View Post
    Ye, but he asked for one EP.
    Maybe so but with 1) one scope at f15 and 2) another scope at f10 PLUS 3) the fact that the Baader zoom can't reach 30mm focal length one won't cut it.

    Plus getting 3 Vixen NPLs is less than half the price of the Baader zoom which is unsuitable for the f15 Carton.
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    Default Re: best eyepiece for the moon

    Quote Originally Posted by not_Fritz_Argelander View Post
    Maybe so but with 1) one scope at f15 and 2) another scope at f10 PLUS 3) the fact that the Baader zoom can't reach 30mm focal length one won't cut it.

    Plus getting 3 Vixen NPLs is less than half the price of the Baader zoom which is unsuitable for the f15 Carton.
    Unsuitable that's a bit harsh. 8mm (150x, 0.5mm exit pupil) should be about right for high power lunar views and 24mm (50x) would give you a wide albeit smallish view of whole Moon. If we are talking just Moon, the range of powers Baader zoom provide is about perfect for the Carton.

    I agree a few good quality fixed FL EPs would outperform a good quality zoom, but if you don't want a hassle of EP case. Zoom will do just fine on Moon.

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    Default Re: best eyepiece for the moon

    One EP: Definitely a quality zoom as mentioned.
    More than one EP: I prefer Orthos and Plossls as was also mentioned. I frequently love to really push the magnification on lunar detail, and in those instances an ortho is my usual first pick. Although I will occasionally throw in a TeleVue T6 for a 'widefield closeup'.
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    Default Re: best eyepiece for the moon

    Quote Originally Posted by Bigzmey View Post
    Unsuitable that's a bit harsh. 8mm (150x, 0.5mm exit pupil) should be about right for high power lunar views and 24mm (50x) would give you a wide albeit smallish view of whole Moon. If we are talking just Moon, the range of powers Baader zoom provide is about perfect for the Carton.
    I disagree strongly. The Baader is "about perfect" for the VMC 110L but the focal length range is too short for the Carton. The Carton needs as long as 30mm for good images on nights of average seeing.

    I agree a few good quality fixed FL EPs would outperform a good quality zoom, but if you don't want a hassle of EP case. Zoom will do just fine on Moon.
    We're going to have to agree to disagree. A 2mm exit pupil on the Carton requires a 30mm eyepiece, outside the range of the zoom. The Baader can accommodate fine detail at a 2mm exit pupil for f12 and faster up to f4.
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    Default Re: best eyepiece for the moon

    Hello all,

    and sorry for my delayed jumping in.

    I have noticed a reported warning against the long focus EPs in the Baader Q set.
    The f=10mm ortho is o.k. for the DSOs, the 6mm ortho is till o.k. when you need the 52° FOV and more eye relief on the ortho.

    A secret tip or bet is the Baader Q triplet Barlow, which beats on the 10mm Leitz Periplan my both Baader Q orthos barlowed, and even the Pentax XW 2.5mm.
    The test I have made have been on the high contrast white lichens on the roof of a nearby building, so no atmospheric turbulence interfered.

    Best,

    JG
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