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Thread: You get 2 eyepieces - that's it... what are they and why?

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    Default You get 2 eyepieces - that's it... what are they and why?



    Ok you get a barlow too... But in this post all you get are 2 eyepieces that have to choose from - what do you pick and why? Also list your scope - of which you get only 1. Oh and money is no object in this eyepiece exercise. I just want to see what people would use when given limits.

    My new scope doesn't come in for a month so I'm bored.
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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    Hi Mr Bored My Main Scope is a 11" Edge SCT , and If I only could have two eyepieces ,With NO Barlow I would have to say my ( Explore Scientific 20mm 100 degree ) and my ( Explore Scientific 34mm 68 Degree ) I don't why but I'm always taking out that ES 34mm 68 degree eyepiece , I guess it's just a all-around grate eyepiece for my scope for viewing everything , I use my 20mm for a lot of deep space stuff , ES has a 25mm 100 degree Eyepiece that I think might be a nicer eyepiece for my Scope but at this time I can't afford it , I do have a 2X Barlow but I'm not crazy about using it so I left it out , I do have a lot of eyepieces but in most cases two or three is all you really need . I hope the Month goes by quickly or ya


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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    OK.,.,I'll bite.,.,First the scope.,8" dob.,good views.,,still portable,..EP#1.,,I don't know which company makes the best one.,,but a 2"31-36mm 70*,.,for locating STUFF.,,and cruzin the M.W. .,,,and EP#2.,, the best 8-24mm zoom EP.,,because they cover a lot of bases.,,and I like to ZOOM around.,,can I swap the barlow for a 2.5powermate??,O+O
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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    I agree with Davy, the 8-24 zoom offers a wide range of mags. that will give you an Idea of possible future purchases. A 2x ED glass barlow lens or TeleVue powermate is a good tool and I use several when viewing and they're a lot that use them for increasing ER on their shorter high power fl ep's and increasing their magnifications.{not all barlows are the same} . All for my Z10 Reflector " Light Cannon" but, if you really want to do a lot of Lunar , Planetary , Nebulae , Galaxy and Star examining a Nagler 3-6mm clickstop can't be passed up .

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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    I've found that you can get by quite nicely for some time with a 25mm, a 12mm and a 2x barlow on a standard 8" f/5.9 dob. The combo gives you magnifications of 50x, 100x, and 200x. If you have a barlow with a removable barlow element you can get 1.5x and therefore can also add magnifications of 70x and 150x to the mix. I got by for a long time with this exact setup.

    It works for a number of reasons. One is sheer simplicity. Your kit only has three items in it. It also works because the magnification ranges cover most of what this particular telescope is capable of most nights. Sure you can magnify more than 200x on it and having a 30-32mm eyepiece would be nice for certain targets, but these magnifications cover the "workhorse" range. It also covers an exit pupil range from about 4mm through to about 1mm and so again covers the most common viewing ranges. And finally, it is an enjoyable setup.

    So for me I'd still pick the same setup (or close to it). The only changes I'd make in my lineup would be using SWA (68-70 degree) or UWA (82 degree) instead of the 55-60 degree ones I've used.
    William.

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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    In my 8" dob I use just two eyepieces most of the time.
    The first is 24mm Meade UWA for galaxies and some DSOs. The second is the BST 12mm ED - it is my favourite, the 12mm gives me 100x mag., which is quite universal and I can barlow it down to 6mm which is maximum usable mag. It is not very good planetary EP however...
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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    I've read the original post three times and still don't know what scope the OP has coming.

    Eyepiece decisions are facts smeared with personal opinion. Without any "facts", I can't even offer an opinion.

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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    Awesome - thanks for the great answers. I bought a 12" Apetura Dob (on backorder until Nov) with an ES 9mm/100 and ES 14mm/100. I have been using an Orion 4.5 with various Hyperion lenses for a few years and finally deiced to go big. I have lots of kids looking through the glass as well so it has to be easy to see for little kids that fidget. For me I would probably take the 14mm and maybe a 21mm if I only had to choose 2.

    I just like to see what other people would choose if given the choice of only 2 lenses for their scope. It's just an exercise. You get to see what people like and why. For instance many people have many lenses yet they gravitate to one or the other all the time. I have never used a zoom on my scope - or the TV Powermate - so now I have those on my list of things to try out (among the many...). The whole point of if being personal is the point. You are running out the door - you only get to take 2 - headed for conditions unknown. What do you take and why?
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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    Now that I know what you'll be using for your light collection, the ES line of 2 in. 100* is ideal with a 30mm SWA in my Z10 although I've got the 9 , 16mm Z100 series which they don't make by that name anymore. That's what would work for me if it was run and view. Eyeball rollers is what I call them nice range in the 16 and power in the 9mm but, when barlowed "lookout " cause the Moon will be in your face close on a moon seeing night. IMHO it's personal to what you are going to be doing. I just seen that you've got it handled, that's what I would get , the 9mm 100* was on sale for a ridiculous price and I jumped all over it.
    Last edited by stepping beyond; 09-30-2014 at 04:21 PM.

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    Default Re: You get 2 eyepieces - that's it... what are they and why?

    Scopes are in my sig, but the Meade and the Efston only have 1.25" focusers, so that's a wrinkle...

    As it happens, I pretty much have been using only the 25 and 10mm plossls, which came with the Efston, and as it happens, they are roughly the focal lengths I would be looking at for new EP's, based on something that delivers a 5-7mm exit pupil and around a 2mm exit pupil. The scopes are all roughly similar focal ratios, f/4.4 for the Efston, f/4.7 for the Meade, and f/3.9 for the Orion.

    I have tried a 31 Nagler in the Orion, and it worked very well, so if money were no object, that might be one I would like, although I could only use it in the Orion, and in that scope it delivers an exit pupil that's a bit on the large side. If I opt for a more reasonable exit pupil, but still in the 2" size, I could substitute the 26 Nagler, or 27 Panoptic. If I wanted to stay in the 1.25" size, I would go for the widest I could get in that size, which is probably a 24 Panoptic. Eye relief is not bad, probably adequate, but I could get a Dioptrx for it, which would fix that completely.

    Then for the 2mm exit pupil, something between 8 and 10mm. I've tried a 9mm Nagler, but eye relief is an issue, but then again...Dioptrx!
    Or I might go with an 8mm or 10mm Delos, which have generous eye relief, and an adequate 72deg AFOV. Then I would Barlow 2x to get my 1mm exit pupil.

    If money were an object, (which it is) then I'd look at the nearest equivalents in Explore Scientific.

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