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Thread: Another 'Which eyepiece' thread...

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    Default Another 'Which eyepiece' thread...



    Well, I've been mooching these forums for a while, read about a thousand threads (maybe not that many, but you get my point) and to be fair; I'm no wiser. So I'm going to ask for some opinions. I've recently moved from a house surrounded by trees in a valley bottom to a bungalow on a flat, slightly raised lump of land, with some excellent views, so the telescope has come back out - I've had a glorious (if low) view of Saturn and Mars.

    I've thus far worked out that buying a flash set in a nice box is a bit of a waste of money, because I'll likely not use half of the eyepieces. Also, I'm aware that my telescope (Celestron 130EQ) is a 'fast' telescope - f/5 - but I'm aware it's entry level so I'm not expecting Hubble images. I suspect that 3 eyepieces and a barlow are probably a wise move. I'm definitely aware that the eyepieces that come with my scope are a poor.They've done their job, to be fair, but really it's time for an upgrade and I'm certain better eyepieces will improve the images I'm getting.

    There are about a gazillion manufacturers, types, and price ranges. So I've narrowed my choices down. In terms of sizes, 25mm, 10mm and 5mm seem logical. Unless someone can suggest different?

    In my poking around for quality eyepieces, I've noted various price bands, and so I've come up with the following options based on those bands.
    * Cheaper end, the Meade 4000 Super Plossls (I know they're actually just standard Plossl's). They seem a good price, and appear reasonably regarded.
    * Next band up - Celestron X-Cel range - seem to get good reviews.
    * Similar price range - Explore Scientific 62; ES eypieces seem to be well regarded.
    * Pushing the boat out a bit - Baader Hyperion series They look well made.

    Now, I'm aware everyone will have their own views on these, and which is best. No, I can't afford TeleVue! What I'm wanting is, an opinion on whether there is any significant difference between them. Should I spend more money on the pricier models, is it worth bothering bearing in mind my equipment? Is there anything about any of those ranges that makes them stand out, or is there an issue that would make them a big 'NO, DON'T BUY THAT'? Is there a range I should consider instead? All of those eyepieces are in my price range, but I'd need to save a bit more for the pricier models. If they're worth it. And is it worth mixing and matching - are different ranges better for different eyepieces?

    I sound like I'm asking a lot of questions here, and I certainly don't expect a straight 'Get That One' answer. Money is tight and I can't afford a significant error. It's not easy, this astronomy lark, is it!

    Thanks in advance :-)
    Celestron 130EQ with stock 10mm & 20mm eyepieces
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    Default Re: Another 'Which eyepiece' thread...

    If you do plan on implementing a barlow into the lineup, and plan to use it frequently, you could go with 10, 25 & 32mm, That would also give you (with 2x barlow) 5,12.5 & 16mm focal lengths. As you see which focal lengths serve you the best on certain targets you could add a few to the lineup. If you can get one of these GSO barlows, you can also use the bottom element of the barlow separately and achieve 1.5X. https://agenaastro.com/gso-1-25-2x-a...rlow-lens.html These are probably available branded under different names as well, so you may want to check into that.

    EP brands and AFOV are very subjective and personal, but you may also look into the Vixen NPL series. They are a fantastic EP and a great value for the performance. All of the brands and types you listed above would be fine choices, except maybe the Hyperion. I see many mixed reviews on those in fast scopes.
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    Default Re: Another 'Which eyepiece' thread...

    Hello, Spyderwerx.. When you said the hyperion EP weren't getting good reviews, are you referring to their low cost 2" models?
    I had my eye on one of those... Mongo sad..
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    Default Re: Another 'Which eyepiece' thread...

    I can't remember precisely which thread it was, but there was one here at AF a short time back where someone spoke of the Hyperion's also. I've seen mixed reviews, some favorable and some not so much. I'll see what I can track down.
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    Default Re: Another 'Which eyepiece' thread...

    Quote Originally Posted by SpyderwerX View Post
    I can't remember precisely which thread it was, but there was one here at AF a short time back where someone spoke of the Hyperion's also. I've seen mixed reviews, some favorable and some not so much. I'll see what I can track down.
    I had the complete Hyperion line and tried them all in my f5 Z12. Don't do that! They were fine in scopes like f10 SCTs but were not up to it in fast f5 scopes. Plossls are better. You might consider the Vixen NPL Plossls. They are about $50 each instead of $30 and I like them quite well enough.
    Last edited by not_Fritz_Argelander; 10-06-2018 at 12:46 AM.

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    Default Re: Another 'Which eyepiece' thread...

    I do remember reading that astigmatism, especially at the edges was the predominant fault in the Hyperion + fast scope.
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    Default Re: Another 'Which eyepiece' thread...

    Quote Originally Posted by SpyderwerX View Post
    I do remember reading that astigmatism, especially at the edges was the predominant fault in the Hyperion + fast scope.
    Big yes on that. The aspherics at 36, 31mm focal lengths in 2" format suffered less but the shorter ones in the dual 1.25/2" barrels were much worse. This was at f5 mind you. At f10 they were OK.

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    Default Re: Another 'Which eyepiece' thread...

    I think you might have to splash some cash with an f/5 Newtonian to avoid the flock of seagulls (edge of field astigmatism).

    https://www.youtube.com/watch?v=iIpfWORQWhU

    I hate to be 'Gene Hunt' blunt about it ... https://www.youtube.com/watch?v=8Lt2U7_NImQ



    But a fistful of good GSO Plossls would work well.

    https://www.365astronomy.com/GSO-Sup...ssl-Eyepieces/
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    Default Re: Another 'Which eyepiece' thread...

    Agreed! Hyperions are not designed for newtonians, especially fast ones, as they correct for a convex focal plane (like in a refractor), not a concave focal plane as per a reflector: and while they may give a sharp image in the centre (as per any other eyepiece!), they get worse as you move to the edge. (Kunama where are you? Correct me if I have this the wrong way around!)

    Plossl eyepieces will work very well with your scope, as will orthoscopics, but they have relatively narrow fields of view. I have heard good things about the ES 68 range, and they seem to be good value for money. If money is tight, you might look at the GSO plossls and "superview" range too. I don't know if they are available near you, but the Parks gold series eyepieces are very nice: the 20mm was my favourite eyepiece for a number of years in my newtonian scope (until it was stolen... ). I have also had some great views though Long Perng LER eyepieces, and these are also very reasonably priced.

    You could try the TS-branded ones here: https://www.teleskop-express.de/shop...big-field.html (sorry about the "Viglink" detour: just hit the "Telescop Express" link to get past it)

    Good luck, and all the best,

    Dean

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    Default Re: Another 'Which eyepiece' thread...

    I have a 9mm X-Cel, I haven't actually used it since the last Mars opposition, but it was pretty good IIRC. I was impressed with the twist up eyeguard, which actually seemed to work well. I decided to purchase the 7mm version and had three in a row with visible debris. I then decided to order a 7mm TeleVue DeLite to make up for the disappointment and promptly received two in a row with debris in the field of view. Finally I ordered a 7mm Kokusai orthoscopic. It didn't have debris but had another visual defect. I replaced it with one that was OK eventually but in the meantime bought a 7mm Sky-Watcher UWA while I was waiting.



    It still gets used a lot in my fast refractors, although I originally obtained it for an f/7 Newtonian.

    https://www.rothervalleyoptics.co.uk...ieces-125.html

    These are about 40 quid and manufactured by Barsta (BST). They are very similar to the TS Optics Planetary HR series IMO.



    https://www.teleskop-express.de/shop...ti-coated.html

    These are also made by Barsta and often sold as BST and Astromania.



    I'm not sure how they would perform in an f/5 reflector, but they are pretty good in an f/4.9 refractor. I find they are ergonomically easier to use than my orthoscopics on planetary targets, yet have just as good contrasted and defined views. With my f/6 Newtonian they can sometimes display a tiny bit of false colour on a bright Moon, which the orthoscopics don't.
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