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  1. #1
    rcsplinters's Avatar
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    Default Questions on long eye relief eyepieces



    Before asking the questions, I'd like to offer some brief back ground.

    I'm currently considering purchase of an Orion xx12i, the "build it" version as I have a few changes I'd like to make (eye pieces and right angle finder). As I'm a glasses wearer, I been told that long relief eye pieces should be given consideration. The "build it" option for the above scope offers the "Orion Long Eye Relief Telescope Eyepieces". I need a few more posts before adding links, but a quick google of the quoted words will provide links to that set of eye pieces. A search of the forum revealed a limited number of discussions and some advised caution, hence my posts. I've got to go back and re-read some of those because the issue may have been limited to specific focal length(s). Given the available budget for this project, I'd be best served if the Orion eye pieces can be expected to give respectable service for a year or two. As a bit of further info, I'm looking at the 18 mm and 9 mm options.

    My question is two fold. First, any comments relative to these eye pieces would be appreciated. Second, any suggestions as to alternate products in a similar price range would be appreciated. What I'd REALLY like to have would be a couple of TeleVue Delos lenses and a nice barlow, but that breaks the bank right now.

  2. #2
    Bob327's Avatar
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    Default

    Well I can not comment on the Orion eyepieces BUT I do wear glasses and any eyepiece that has 15 mm of eye relief works just fine...most of mine are 20 mm ...

    But I have a funny feeling that you will not be USING all that many high powered eyepieces in that "light bucket" I run a 11 inch Sct and I use my 26 thru 35 mm eyepieces a heck of a lot more then I do my higher powered eyepieces... As for the Delos it is a darn good eyepiece BUT the reviews I've read favor the Pentax XW's which believe it or not are a little cheaper and they are not cheap either..

    Explore Scientific eyepieces are the newest bestest eyepieces when you factor in the prices from what I gather from reading EP reviews and are often compared to Neglars ...BTW I do not like any 82 degree FOV eyepieces as I find all of them uncomfortable (have to shift my old eyeball all over the FOV) and now only use 68-70 degree FOV eyepieces..prefer Pentax XW for high power and Panoptics for low power.. What I am hinting at is you really should IF possible haul that scope out to a star party and "borrow" a few eyepieces (which is common at most star parties) to see what you like ...

    Clear Skies..

    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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  4. #3
    Star Rider's Avatar
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    Default

    Have a look at the Explore Scientific line up. Very nice eye pieces and very nice pricing, I have 3. A 25 & 35 70 deg. and a 6.7 82 deg and I very happy with them. With that nice new dob you're going to need good quality eye pieces or you will be wasteing your money. But that's just my opinion. Enjoy that new scope.

    Clear Skies,
    Bob

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  6. #4
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    Default

    Keep in mind that if your plan is to purchase both the 18mm and the 9mm, the 18mm barlowed looks to be equivalent to the 9mm.

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  8. #5
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    There is a long discussion on eye relief in general, and this particular line of EPs here:
    Telescope Reviews: Very Disappointed
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  10. #6
    rcsplinters's Avatar
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    Default

    Thanks all for the replies.

    Bob and Star Rider, I've gone back and read a good bit more on eye pieces and discussed it with my banker (man she is tough). As a result , I'm looking a bit more heavily at the Televue Panoptic 27 and Delos 10 after studying lenses from Explore Scientific and Pentax as you guys suggested. Frankly, its a much tougher choice than I ever expected. I managed to trip over a bit more info on those specific Televue eye pieces which had very high recommendations from wearers of eye glasses of similar age. I got over the initial sticker shock when I considered that I've dropped that much on a camera lens several times in the past. It was tough to back away from those Pentax lenses as I cut my photography teeth on an old Pentax SLR decades ago. It had really good glass.

    Bohica, I'm really glad you pointed out the obvious with the 18/9 FL selection and Barlow. Proof positive that more eyes, the better.

    WWPierre, interestingly enough, it was that very thread that drove me to ask these questions. I managed to not recognize it was multi-paged though and went back to read the entire thing. I agree it was an excellent discussion of eye relief.

    I'm still probably a week or two from placing the order, so any other thoughts would be most helpful. Thanks again for the very helpful discussion on this and other threads.

  11. #7
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    Default

    I wear spectacles and am not comfortable taking them off because I am pretty blind without them. I am a beginner although I did a little stargazing in my youth and worked with computers on big telescopes in the 1970s. My eyes are 62 years old. I would like to make a plug for the Explore Scientific 82 degree eyepieces. I only have the 30mm - the 6.7mm has been delayed due to some mix up at the supplier. I agree with Bob327 about having to look around to see the whole exit pupil, and share his old eyes maybe don't want to do this, but I disagree that this is a disadvantage because quite frankly this eyepiece is VERY forgiving. I have a Televue Radian 4 mm as well and (it may just be the short focal length, but this also has 20mm eye relief) I have to look for the exit pupil - I get all those alternative light paths with kidney beans of darkness from the baffles and it can take me a few seconds to find the exit pupil and center it (when, of course the image is then perfectly fine). With the 82 degree I just have to put my eye to the eyepiece and I am looking out into space - I can look around and see the edges of the exit pupil but there are zero alternative lightpaths with black kidney beans to encounter. Of course, I have had trouble centering objects in the exit pupil because I am not aware of its boundaries. I am looking forward to seeing whether the 6.7mm is so easy to use.

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