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Thread: Orion Planetary Edge On vs Stratus eyepieces

  1. #1
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    Default Orion Planetary Edge On vs Stratus eyepieces



    I have recently purchased an Orion XT8 as an upgrade to the Celestron Firstscope I still use for neighborhood star/planet viewing. I have a set of Celestron Plossl's and a 2x Barlow I use with either a night pollution filter or variable polarizing filter. I wear glasses so I have to remove them for using the higher magnification Plossl eyepieces. I have already read that I should not consider purchasing less than a 6mm for the XT8. I like that the Stratus can be used in the 2" focuser without the adaptor but they don't have a 6mm only a 5mm. If I got the Planetary Edge On they sell a 6mm and a 9mm. Would my planet viewing be better served with which one?

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    Default Re: Orion Planetary Edge On vs Stratus eyepieces

    Welcome to the forum, Doc

    I never tried a Stratus, but I tried a Baader Hyperion with the dual-size... turned out I didn't like that feature because it made for a needlessly fat eyepiece that was hard to fit in the 1.25" tray slot.

    I do have an Edge On Planetary 9mm, frankly didn't like it all that much either. Much prefer my Meade HD-60 9mm. In fact I was thinking to resell the Edge On, if you're interested send me a PM.

    Hope you enjoy the XT8, I sure have mine

    Ray
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    Raymond Howard
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    12.5" f/6 custom Dob by New Moon Telescopes, Orion XT8 f/6 "ruby-red" Dob. Finders 13x80 Stellarvue RACI, 9x50 Orion RACI. Eyepieces 34mm Explore Scientific 68°, 24mm ES 68°, 16mm ES 68°, 10mm TeleVue Delos 72°, 7mm TeleVue DeLite 62°.

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    Default Re: Orion Planetary Edge On vs Stratus eyepieces

    Before I bought my Stratus 5mm for my f/5 scopes I 2x Barlowed my 8mm Stratus for 188x and that seemed to be the sweet spot for my 6in scope.
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    Default Re: Orion Planetary Edge On vs Stratus eyepieces

    Hi skfboiler

    You're making me think the 5mm Stratus might work with my f/5.9 XT8. If Ray didn't like the Planetary Edge On sounds like the Stratus might be more to my liking.
    Last edited by DrZGard; 10-31-2014 at 04:13 AM.

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    Default Re: Orion Planetary Edge On vs Stratus eyepieces

    I'm not an eyepiece expert but I'm pretty sure the 5mm Stratus will work. If you get it and don't like it I'm sure you can send it back for refund. In addition to planets, I use my 5mm for small planetary nebulas and double stars.

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    Default Re: Orion Planetary Edge On vs Stratus eyepieces

    A few thoughts based on my experiences with a 6" f/8 1219mm focal length refractor….

    1. With more or less the same 1200mm focal length with an XT8 dob, a 5mm eyepiece will give you 240x, and a 6mm eyepiece gives you 200x. Both are good choices for planetary viewing, assuming good viewing conditions. When conditions are poor however, I spend a lot more time behind my 9mm eyepiece (67x). 3mm is serious overkill at a 1200 mm focal length.

    2. Orion just rebrands the Edge On eyepiece but they mark it up over 100%. Zhumell has the same eyepieces branded as their Z Series Planetary eyepieces. They are currently available in the US through Hayneedle for $45 each in 18mm, 14.5mm, 12.5mm, 6mm, 5mm, and 3mm apertures. That's a much better deal than the $110 that Orion charges for the same eyepieces. It's not quite apples to apples as Zhumell does not market the 9mm eyepiece through Hayneedle, and similarly, you can't get the 18mm eyepiece from Orion.

    3. I can't directly speak to how well they work in a fast reflector, but I've been favorably impressed with them in a refractor. They are sharp edge to edge, they have great eye relief and are for the most part par focal with each other (the exception is the 18mm eyepiece which is a bit off from the others). Given that I only paid $45 each for my Zhumell Z series eyepieces, I'm very favorably impressed with them. I eventually picked up a 9mm Edge On eyepiece on e-bay for $45 as well, so that's an option if you're not in a big hurry.

    4. The Zhumell Z series/Orion Edge On eyepieces are 55 degree FOV eyepieces, about the same as at the average Plössl, but with much better eye relief and edge to edge sharpness. The Stratus eyepieces are 68 degree FOV eyepieces, so if you really value a wider field of view, then you'll want to consider them. You'll have to ask yourself however whether the extra 13 degrees is worth another $100 per eyepiece. In addition, with an uncorrected reflector, you'll also want to consider whether the wider field of view will be usable or whether you'll start having issues with coma.
    Last edited by AR6; 10-31-2014 at 06:13 PM.
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    Default Re: Orion Planetary Edge On vs Stratus eyepieces

    Yes, the Zhumell "Planetary" eyepieces appear to be the same as the Orion. Wished I'd known that before I paid the Orion premium price, especially since turned out I didn't like it much. But as you say, the 9mm isn't available as Zhumell, and that was the FL I wanted at the time.

    Ray
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    12.5" f/6 custom Dob by New Moon Telescopes, Orion XT8 f/6 "ruby-red" Dob. Finders 13x80 Stellarvue RACI, 9x50 Orion RACI. Eyepieces 34mm Explore Scientific 68°, 24mm ES 68°, 16mm ES 68°, 10mm TeleVue Delos 72°, 7mm TeleVue DeLite 62°.

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