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Thread: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

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    Default 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece



    I am looking for a high power eyepiece to use with my 8" dob. My budget is around $90.00. What are your opinions of these eyepieces or do you have suggestions for something else? It would be used mostly for planetary viewing and I do want a long eye relief no matter what I get.
    Thanks a lot,
    Gene
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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    I'd go with the edge on. It has more eye relief, smaller filed of view (the objects will appear larger in the filed of view), and less filed distortion.


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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    I have the 9mm Expanse, I believe they are Barsta made. I'm not sure who manufactures the Edge-On series. They look capable though and are probably good for what they cost.
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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    The Edge On eyepiece are Long Perng's. Decent for the cost, though Orion tends to price these much higher than other vendors.

    The same ones can be had branded differently, such as Zhumell: https://www.telescopesplus.com/colle...cope-eyepieces

    Much more affordable there.

    I've got the 5mm, and it's a good eyepiece.

    These can be found on Ebay in various iterations too if one cares to search for them.
    Bryan

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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    I will also toss out the Agena Starguider Dual EDs for consideration. AFOV is 60° and cost $60. I find them an excellent value for the price and work well for planetary.
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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    I would probably go with this Celestron 1.25" X-Cel LX Eyepiece - 7mm # 93422

    Unless you can stretch the budget and go with this which is wonderful in your scope Explore Scientific 1.25" 82° Series Argon-Purged Waterproof Eyepiece - 6.7mm
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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    Quote Originally Posted by Ozman13 View Post
    I would probably go with this Celestron 1.25" X-Cel LX Eyepiece - 7mm # 93422

    Unless you can stretch the budget and go with this which is wonderful in your scope Explore Scientific 1.25" 82° Series Argon-Purged Waterproof Eyepiece - 6.7mm
    Another good choice as well Oz. I will also mention the Meade HD60 as another alternative which has a 4.5mm, 6.5mm and 9mm in their line (~$75). One could also wait for the coming ES 62° series, which will have a 5.5mm and 9mm among their compliment ($100).

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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    The X-Cel XL series are very good, very little light scatter and a sharp image. I used my 9mm (Barlowed) to view Mars at opposition last year. I decided on the 7mm as well. Unfortunately my 7mm had visible internal debris. I returned it and it was replaced twice, both with the same fault. I've heard that this has affected the 7mm and 18mm versions in the past.

    I ended up with a Sky-Watcher 7mm UWA.
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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    Hi Gene. I have two of the eyepieces that you mentioned.
    6mm eyepieces.jpg
    When I bought my used Astroview 127mm Mak-Cass telescope from a chap in Orlando, he had the entire set of SkyWatcher UWA (Orion Expanse clones). When I later sold this telescope and bought the Orion 180mm Mak-Cass telescope, I kept these eyepieces. They are a nice step up from the Plossls at 60 degrees and sharpness for little more money. Later, I bought several of the TMB Planetary II eyepieces. They are a classic design, and rated at 58 degrees. The Thomas M. Black designs were originally licensed to Burgess, and then later to Astronomics, who no longer offers them. I only include this for academic reasons. Finally, I saw the Orion Edge On (long eye relief) clones at Adorama and Smart Astronomy. I have known Victor Quarto at Smart Astronomy for many years, and when he was closing these out, I bought the entire set from 3mm to 27mm. As the kids say; "They really knock my socks off at the eyepiece for lunar and planetary viewing." However, as others have pointed out, variants may still be available from Agena AstroProducts and other vendors with excellent pricing.There are certainly even better eyepieces from TeleVue, ES, and others, but they may cost above the target budget that you listed. Lastly, I must tell you that with my lousy skies, humidity here in Florida, and upper atmosphere spherules, I seldom use an eyepiece focal length shorter then 9mm with my telescopes. I hope this helps Gene, and the best of wishes on your next eyepiece(s) decision.
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    Default Re: 6 mm Orion edge-on eyepiece vs 6 mm Orion expanse eyepiece

    I should give these a mention too. They're almost certainly Barsta and marketed as BST, TS Optics inter alia.

    TSO pair.jpg

    They don't suffer quite so much from EOFB and ghosting as the Sky-Watcher UWA's, possibly due to better flocking.
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