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Thread: Explore Scientific 8.8mm 82 degree fov

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    Default Explore Scientific 8.8mm 82 degree fov



    Great for a F/4.6 356mm

    After finally unpacking and assembling my telescope I recieved a couple starter eyepieces, Orion Sirus Plossel 1.25" 10mm plossl (10mm Orion Sirius Plossl Telescope Eyepiece | Orion Telescopes) and Orions Deepview 2" 35mm 3 element (35mm Orion DeepView Eyepiece | Orion Telescopes: Eyepieces) . They had a few shortfalls, both were in the 50 degreeish apparent field of view, both were a little tricky to use, and the eyecup was emmitting a chemical odour that is a eye irritant. I could see coma with the 35mm and the field when scanning around was noticeably deformed. The 10mm plossl was nice in most situations but was not parafocal with the 35mm. It also required that I move the telescope frequently to keep objects in view. I also had a older Celestron K20mm (Kellner) which produced a nice image, albeit reflection city if the object was very bright. So after researching the vast landscape of eyepieces and reading multiple reviews, I came to the conclusion that Explore Scientific seem to be in the sweet spot when it comes to price and performance.

    ES88side.jpg

    I got in my 8.8mm ES 82 degree at the beginning of a run of many great nights of observing. So many great nights that I was lacking alot of sleep and, apparently, grouchy at work! First inspection revealed the eyepiece is much more weighty than any of my other eyepieces and the finish is superb. The waterproof feature is a nice bonus, this eyepiece will require less maintenance to keep performing because of it.

    Visually, when compared to my Orion Sirius 10mm plossl, there is a difference. Colors are actually toned down a bit (this must be the color correction at work and the images are more contrasty. Globular's are more stunning, distant galaxy's show more, bright stars are literally amazing, the field is flat and sharp from edge to edge, and the extra weight means the eyepiece holds heat better and doesn't fog up so quickly. Most importantly, the 82 degree field means I spend less time moving my telescope and sharing the eyepiece with others is easier when I don't have to keep bringing objects back into view.

    ESmulticoating.jpg
    Multicoatings in action.

    The only negatives I can see with this eyepiece is that the eyepiece requires that your eye is in a certain spot to see the full field. Otherwise you'll have blackouts. So it takes practice to use, but now that I have put in a number of viewing sessions I have few of those moments and they are not a distraction, occasionally, I purposefully use it to darken objects (Venus and Jupiter before I pull out my polarising filters). This could be, partially, because my telescopes low F/4.6 value is making the eyepiece a little more finicky too. I'll see when I get my Powermate 2x if this remains the same. Hardly worth mentioning but I'm laying it all on the table here. Their is a small teardrop reflection when a really bright star is slightly out of the field. This is because of the first ring being a little too reflective. I'll say that it is not a issue with me and the fixes I have read about are easy to implement. I liken this to a lens flare, a neat characteristic of the eyepiece that rarely shows. Finally, these lenses when through a evolution and they have now ended up looking nearly exacly like a Televue Panatopic (Tele Vue Panoptic 1.25" and 2" Eyepieces | Telescope.com: Tele Vue). I do wish they had a little more imagination with the design rather than a straight up copy. Who knows how it works these days. Maybe Televue gets their eyepiece cases from the same factory as Explore Scientific or whatever possible situation led them to nearly excatly the same look. Maybe they are the same eyepiece with different names stamped on them?... Explore Scientific 100 degree look to have more imagination.

    ESbottom.jpg
    Threaded bottom and reflective ring

    When I use this eyepiece with my 127 Celestron Powerseeker, I have to say, it's impressive. This scope is far below my xx14i visually, but with the wide field of view the scope is far more enjoyable. I can't look at more than just a handful of objects with this scope, but this lens makes the viewing much better. Lately I take this scope without the mount and sight in by holding. The wide field of view makes locating way easier. Cassopiea double cluster is memorable with this eyepiece and scope.

    Ultimately, this eyepiece blows away all my other eyepieces and then some. If you are in doubt, this is your recommendation to go for it. It has made my viewing sessions move to the next level. I'm undoubtedly a fan and the 30mm is coming in the mail.

    ESvenus.jpg
    A quick snap of Venus with the sun up (Orion XX14i & 8MP Samsung Galaxy S2).

    Thanks for reading!
    Last edited by 2orthern2ights; 12-01-2012 at 04:22 PM.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Thanks for the report and for the enclosed pics,

    JG
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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Great report, thanks for posting your review, it is good to hear a first hand account.. I have been interested in purchasing an ES 82 degree eyepiece as my first addition to the eyepieces that came with my scope.. I have an Orion XT8 1200mm focal length scope and want to get a more powerful eyepiece for viewing Jupiter and Saturn.. Trying to decide between the 8.8 mm, 6.7 mm, and 4.7 mm as I don't want to get one that is more than my scope can handle..

    Clear Skies,

    Les

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    As long as your scope is perfectly collimated, any of the ES 82* EP's will work with your scope. I just got some breathtaking views of jupiter in my 4.5" F7 Orion dob using the 4.7 mm. I've also used it in my Z12 and a couple of c8's. It's quite the performer. My next goal is the 6.7, 11, and the 24mm. I'm not sure about the 14mm.

    Quote Originally Posted by les_robot View Post
    Great report, thanks for posting your review, it is good to hear a first hand account.. I have been interested in purchasing an ES 82 degree eyepiece as my first addition to the eyepieces that came with my scope.. I have an Orion XT8 1200mm focal length scope and want to get a more powerful eyepiece for viewing Jupiter and Saturn.. Trying to decide between the 8.8 mm, 6.7 mm, and 4.7 mm as I don't want to get one that is more than my scope can handle..

    Clear Skies,

    Les
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    Default Re: Explore Scientific 8.8mm 82 degree fov

    With my xx14i 1650mm I get (1650/8.8) 187.5x magnification.
    Les_robot, your XT8 with 1200mm you get (1200/8.8) 136x magnification. Maybe the 6.7mm would be closer to the highest useful magnification on a average night @ 179x.

    I was toying with the idea of getting the 6.7 or 4.7 but I think that the field rotation may proove to be a little much. I'm going to have a 2x Televue Powermate soon so I'll try to double the 8.8 mag down to a 4.4 and see if that is enjoyable to use or too much. Right now I have a 3x cheap barlow that has a awful effect on the image quality never mind the magnification being up around 562x which is probably too much in almost any situation.

    That venus picture there was during a morning of some interesting seeing conditions. I had a thin layer of clouds moving through, that was cool in on itself. Venus was distorted by the atmosphere as usual (looked a little hairy), but occasionally I could see the sharp disc of the planet. Only for brief moments the fuzzy air distortion would let up a little and behind a razor sharp planet. Really cool. I watched Venus on and off for a few hours that morning.

    This eyepiece is at the highest useful magnification for most evenings. I don't think I would get away with more magnification unless I moved to a location with better seeing.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Nice report and pictures. Thanks.
    Bill

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Thanks so much 2orthern. I have the same eyepiece sitting in my eyepiece case.....still unused due to certain weather conditions..... Really looking forward to trying it out on my 'umble little scopes. I have the 9mm 100* ES on order.....I suspect it is on back order 10x over now.

    FYI: I regularly stop off at the Wakaw Shell (best gas prices in that area of SK and friendly service to boot) on our Friday-afternoon-mad-dash to our cabin/land by Tarnapol which is my dark observing site...We are almost neighbours!!! I have my C-8" at the cabin.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    ahh..wish I could edit my post. I have the ES 24mm 82* collecting dust not the 8.8mm. Doh.
    Last edited by Bugs; 12-01-2012 at 11:41 PM.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Thanks for the replies everyone!
    Tarnapol? Bugs I can't belive that! I was up around Tarnapol helping my brothers hunting last weekend. We seen some Mule Deer but no Whitetails, we might try again tomorrow. My family had homesteads around there. That's awsome!
    Next time your down, and the weather cooperates, we'll have to hookup and checkout some stuff.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Hey - appreciate the review. I'm anxiously awaiting the arrival of my 8.8. Good to know I made a good choice.

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