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Thread: Explore Scientific 82 degree vs 100 degree?

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    Default Explore Scientific 82 degree vs 100 degree?



    I've got a Zhumell Z8 and I think the Explore Scientific eyepieces would be a good fit for it. They make an 82 degree line and a 100 degree line and I would like some input on my decision

    I don't fully understand the difference between these two lines of eyepieces, as I've only ever used the ones that came with the Z8, but the 100 degree eyepieces are several times more expensive than the 82 degree ones. Are they worth it? Are there any other differences I should know about? If all I've ever used were crappy eyepieces, would the 82 degree ones blow me away just as much as the more expensive ones?
    I know that the idea of a wide field of view sounds awesome to me, but is it worth the considerable extra expense? I guess my big concern is that I'll get the 82 degree eyepieces and in a couple years wish I'd gotten the 100 degree versions.
    Thanks for any input.

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    Default

    No one can really answer that question for you. It really depends on what you like.

    But if you like the 82 degree eyepieces you will probably like the 100 degree ones even more.

    But there are some of us who really don't like an eyepiece with a AFOV over about 70 degrees. You might be one of them.

    Ideally, you try out one or more of the very wide angle eyepieces before you buy any so that you will be able to discover your preference. It's not happy-making to discover that you paid $300-400 (or more) for an eyepiece that you don't like.

    But understand, this is a matter of what you like.

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    You piqued my curiosity so I went out 12/28 to the Explore Scientific
    web site.

    If you go to the buy 82 degree page, they have an illustration on the left side of the page that depicts 40 - 50 -60 - 70 and 82 degree FOV for M45 ( Pleiadies ).
    That will give you an idea.

    Nothing that I saw for the 100 deg FOV though.
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    Default

    Thanks for the input, guys. I'll check out the ES website and I guess I'll have to look into attending a star party to try out some eyepieces for myself.

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    Default

    Quote Originally Posted by breakspirit View Post
    Thanks for the input, guys. I'll check out the ES website and I guess I'll have to look into attending a star party to try out some eyepieces for myself.

    Hmm, yes. That would be a great idea. I didn't have any SP near by so, I went through the 50*, then the 72*, quickly followed by the 82*, then there were the 60* and finally ended up enjoying the 68-72* FOV's, all within the span of on year! Ether way you look at it, I spent a lot of money trying to figure out witch FOV I was comfortable with. So if you don't want to go down that road, a SP is highly recommended.
    Cal
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    ES 11mm, 16mm, 20mm, 24mm


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    Default

    Yeah, one thing which may not be immediately obvious is that with the immersive eyepieces you do not look into the eyepiece and see 100 degrees of apparent field of view. You move about a bit and look to the left, to the right, up, and down in order to see the whole field of view. It is actually not clear that this adds much utility over a 60-70 degree eyepiece - and you pay a lot for that. But I like it.

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    Default

    Personally, I find that 70 degrees is plenty. With 70, I am already having to peer around a corner to see the edges of the FOV. 82 degrees would be pointless, IMO, and 100 degrees - well, there's lots of other gear I can spend that kind of money on.

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    Default

    You guys are really making me feel like, while the 100 degrees is nice, it ain't worth double or triple the price of 82 degrees which may itself not be super worth it. But, an 82 degree ES eyepiece is like 100 dollars, which is very acceptable to me. Like you guys said though, each person has their own preferences.

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    Do you where glasses? If you do you will need to remove them for viewing with the 82* eyepieces. And yes, if all you have ever used were crappy EPs the Explore Scientific EPs will blow you away. Really all it comes down to is how wide of a view do you want. Regular Plossls are around 42* or so. So anything past 60* would be a nice improvement. I prefer all 1.25 inch EPs, so that influenced my decisions as well.
    I have a few of the EPs you mentioned listed in my Sig.
    15 inch Obsession
    Low Power: ES 28mm ~60x @1.1° : Televue Delos 17.3mm ~100x @.72°
    Medium Power: ES 14mm ~122x @.82° : Televue Delos 10mm ~170x @.42°
    High Power: Televue Delos 6mm ~285x @.25° : ES 4.7mm ~365x @.22°

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    You HONESTLY have to beg barrow or steal a Ultra wide Angle eyepiece (or attend a local star party) and see if you like them or not....

    I sold my one and only Nagler years ago because I found it to be uncomfortable to use...Had to shift my old eyeballs all over the place to "adsorb" the entire FOV and now use only 68-70 degree eyepieces...

    This "problem" is not at all uncommon...all I can say is this is one guy who has absolutely no interest in using let alone owning a ULTRA ULTRA wide 100 degree eyepiece...

    Ya gotta test em to see if you like them,...

    Bob G.
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
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