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Thread: Explore Scientific 8.8mm 82 degree fov

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    Default Re: Explore Scientific 8.8mm 82 degree fov



    2orthern

    I will try and send you a pm.

    bugs

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    great report my man.i have the ES 14mm 100*deg EP & I Love it.But at £390 I SHOULD.and they now have a 3" EP you can see it on you tube.ONE of the guys posted it.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Great report 2orthern2ights!

    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..
    Les
    I can vouch only for the 4.7 in your list - it's a great piece of glass and I've used it in all my scopes including my PST (where oddly it seems to get used the most). When I went to WFOV lenses I started with a 24mm one and if you look at my signature you'll see the list has grown with the 18mm being the latest one.

    Be forewarned, once you look through one of these WFOV lenses you're going to be hooked....bad
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    Celestron Omni XLT 120, Explore Scientific AR102,
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    Dob; Orion Apex 102 Mak; Coronado PST. EP's: ES 4.7, 6.7, 11, 18 and 30mm 82° EPs; Baader 24mm 68°; Luminos 15mm 82°; Meade 8-24mm Zoom. Other: CG4+16" Orion Pier Extension; Celestron 20x80 binos etc;

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    Quote Originally Posted by AbbN View Post

    I can vouch only for the 4.7 in your list - it's a great piece of glass and I've used it in all my scopes including my PST (where oddly it seems to get used the most). When I went to WFOV lenses I started with a 24mm one and if you look at my signature you'll see the list has grown with the 18mm being the latest one.

    Be forewarned, once you look through one of these WFOV lenses you're going to be hooked....bad
    You used the 4.7mm on your PST? How is the view on that? I was told that anything below a 6mm would not be very good.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Quote Originally Posted by uctrekker View Post
    You used the 4.7mm on your PST? How is the view on that? I was told that anything below a 6mm would not be very good.
    This lens is!

    Here's another comment I just made regarding it - HUGE eyepiece!


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    Dob; Orion Apex 102 Mak; Coronado PST. EP's: ES 4.7, 6.7, 11, 18 and 30mm 82° EPs; Baader 24mm 68°; Luminos 15mm 82°; Meade 8-24mm Zoom. Other: CG4+16" Orion Pier Extension; Celestron 20x80 binos etc;

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Les Robot,

    My suggestion for you would be the ES8.8. I have an XT8 and find that my ES11 is a great mix of magnification, exit pupil, scope and eye limitations and seeing conditions. I have the 6.7 and 4.7 but use them mostly in a 4 inch refractor of lesser focal length. I love the Hyperion 8mm in the dob, and don't think you would get as much use out of the 6.7 and 4.7 eyepieces in your XT8 unless the seeing is superb.

    David

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Complete newb here! I have a Z8 f/6 Dob and have been looking to start upgrading EPs. My primary targets are DSOs, but I tend also to gravitate toward (pun intended) bodies of a planetary nature. How would an ES 82 deg 8.8 benefit me? Or would I be better served by an 11mm? Any help in this decision is appreciated.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Hello Guistarman, welcome to the forum and thanks for trusting us with your question.

    Firstly, note that the thread you're posting in is at least 5 months old. It would be better to either start your own thread or piggy-back on a more current discussion. The members here are mostly eager and willing to help you where possible but you gotta place yourself where you can be more frequently seen.

    Below are some references that will get you started. I do wonder, however, why you ask whether the 11mm would serve you better than a 8.8mm?

    When considering superior brand eyepieces such as Explore Scientific the issues are no longer about quality or value for money. You just know that you'll be getting that. Rather, your decision becomes has more to do with YOUR specific requirements and the optical parameters delivered by that particular eyepiece in your particular scope which include:

    Magnification
    True Field of View
    Exit Pupil

    The information referenced below is sufficient to build you a firm and secure knowledge base from which you can make all future buying decisions.

    Telescope Equations

    A Treatise on Optimizing DSO Observation

    A Treatise on Optimizing Planetary Views

    http://www.astronomyforum.net/telesc...eyepieces.html

    Some of these are also available as Stickies at the beginning of each sub-forum.

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    The ES82* 11mm would also be a great idea. It gives great views of Jupiter and its moons, it's also a great DSO mid-level eyepiece. Barlowed to 5.5mm would be great on good seeing nights.
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    10XTi; 102 XLT w/CG4, ST80A w EQ1 Minimount & 2" Focuser, Coronado PST; ES 68: 34,24,20,16; ES 100: 20,14,5.5mm; Naglers: 13T1,11T1,9T1,7T1,4.8T1 (smoothies); 3-6mm zoom; 22 & 24 Pans, 3.7,4.7,8,13,17 Ethos, 6mm,8mm, 12mm, 17.3mm Delos; TV Plossls: 40,32,20,17,15,7.4 Orthos: UO-OPS 12,9; UO HD 7,9; 7mm RGO, Vixen NLV: 25,20,15,10,9,5; Pentax XW: Complete Set; XO: 2.58mm; Pentax 12.5mm Kellner; Misc Orthostars--ES82s are history

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    Default Re: Explore Scientific 8.8mm 82 degree fov

    Guistarman,

    Kipper- Feet has given you a great list of info to digest. When finished reading, you will be able to make an informed decision. I own an XT8, and if I had to choose only one eyepiece for you, it would be the 11mm.
    General rule of thumb - take your focal ratio (f6) and double it, giving you 12 - that will give you a good compromise of magnification, brightness, contrast and exit pupil. A 11mm is much closer to 12 than an 8.8 is.
    I use a 10mm Televue and 11mm Explore in 3 scopes and they get alot of use. At $99. for a 11mm Explore you can't go wrong with this eyepiece in your scope (133X).

    David

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