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  1. #1
    caheaton's Avatar
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    Question Edge-On or TMB and SWAN or EF ??



    First, I would like to thank those who have assisted me in my EP quest in this and other posts on the forum. I think I'm narrowing it down (but everytime I decide on one, another contender arises to challenge ). So, with that said, what would be your choice among the following matchups:

    HIGH POWER CATEGORY
    Zhumell Z Series Planetary (Edge-On clone) 5mm
    TMB 3.2mm (prefer 4mm, but it's out of stock)

    WIDE FIELD LOW POWER CATEGORY
    Williams Optics SWAN 15mm
    Smart Astronomy EF 16mm

    Important criteria for me are: contrast, accurate color (particularly in the wide angles for true star colors), sharpness across the field, and eye relief (will be using with glasses). Weight is also a very important factor...I've tried the Stratus and loved the view, but it's too heavy for my scope. In the wide angle category I'm looking for an eyepiece that offers a comparable level of sharpness and color fidelity.

    So...what is the wisdom of the group here? (Or would I be better off to stick with what I have...Meade 4000 series Super Plossls...views are okay, but they don't seem to have the crispness of the Stratus and the eye relief is a real issue with them). Also note that these will be used in an F/5 80mm refractor.
    Craig

  2. #2
    roverich's Avatar
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    Default

    Hi Caheaton ... I kinda like the meade stuff myself ..The plossls dont have a real wide field but the series 4000 SWAs have a 70 degree field ..You can get a series 4000 SWA 15mm for around 60 dollars ...
    16in Night sky
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    F4.5 , 90mm refractor 500mm FL , 7in
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    classic Big-mac , Meade eye pieces with a few odd balls thrown in ...
    If you cant stand behind the american soldier ,
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    Please stand in front of one ...

  3. #3
    RussL's Avatar
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    Default

    Well, I can comment on the TMB from experience. But I have the 8mm. Bear in mind that mine is the black barrel planetary. Regularly $60, but caught it on sale for $40. It's not the Type 2. In my 80mm f5 achro the views were just fine and pretty crisp to the edge at 50x. I almost feel that the image was a tad softer than a Plossl, but not by much, if indeed it was. Colorwise, maybe just a wee bit warmer than a Plossl. (I was comparing it to a Sirius 7.5mm). Eye relief is 14mm. I also wear glasses, and I could see the entire FOV easily if I made sure I rolled down the guard and positioned my eye straight in. No real problem there, but 2mm more would be nice as well. It worked in the 2x Barlow, but is at the end of focuser travel and I'm not sure if I'm reaching exact focus (or actually that may have been in my 120ST, can't remember). On bright objects there is a bit of a glow around them, say like Jupiter, but it doesn't interfere with what I'm seeing as far as detail on the planet surface. Once in awhile I see a ghost image, depending on ambient light or what combination I'm using, Barlow or not. Again, not a problem, but can be distracting. As for the edge view, I actuall watched the Double Double go off the edge with no change at 100x, but in the 120ST I have also seen a slight distortion at around 80% out. I bought the piece after hearing so many good remarks about them, and it is a good piece, especially for the price. But I dunno how it stacks up against some others. If you get one, be sure to check the tightness of all the parts. The nosecone was loose up inside the barrel, but no problem to reach it and snug it up. Fit and finish seem to be exemplary otherwise.

    Hope that helps. Cheers.

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  5. #4
    jeebusroxors's Avatar
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    I have the Z Series in 6mm and I love it. I can't really comment on the accuracy of colors (looks fine to me), but everything in the FOV is nice and crisp. The eye relief is top notch, 20mm. It IS a bit heavy though, although this may be indicative to all EP of this type, I don't know.
    Space is big.

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  7. #5
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    thanks for the feedback guys good to know
    Name: Gus OTAs: ED 100 PRO refractor, Orion ST80 (not the CF), 8" Dob stuck in Canada Mounts:HEQ5PRO Synscan mount, Manfrotto Tripod CAMS: Guidecam Philips SPC900 webcams (4), Canon unmodded-450D DSLR

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  8. #6
    Philip F's Avatar
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    I have the 6mm & 14.5mm Edge-On's. I love them. They are my best EPs. Crisp with great eye-relief (very important) and good apparent field. In my 130mm F5 Newt, the 14.5 even makes a good Deep Sky cross-over EP. My biggest complaints are the weight, eyecaps become stiff when cold and not very parafocal. The Zhumell Z series appears to be a good clone. I dislike the Meade eye relief at observing sessions. I also like the Stratus, but it's quite a price jump, especially for my current scopes.
    Last edited by Philip F; 04-18-2012 at 12:18 AM.
    Sky-Watcher 130mm f5 Newtonian, Rebuilding a 6" f9 Newton 1st built 1981,
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    , Orion 27 mm edge-on and various filters.

 

 

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