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Thread: premium ep decisions.

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    Brian niven's Avatar
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    Default premium ep decisions.



    Ok so after much deliberation on a new premium EP I have decided on a Pentax XW. Now I want to fill the gap between my 25mm x-cell lx and a 7mm x-cell lx. I have a televue 2x Barlow. I mainly will be using this to observe dso and globular clusters/planetary nebula.

    What do you suggest I buy, the 20mm Pentax or the 14mm one?

    Or throw a spanner in the works. For that kind of dough any other suggestions? It needs to by 1.25" hence the 70*Pentax and not an 82* 2".
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    Default Re: premium ep decisions.

    It sounds like you got the right idea,if it's for the scope in your pic then I would go with the 14mm medium power ep. That's my opinion , you already have 3 high and a low, now you need a medium. Living life through the eyepiece
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    Default Re: premium ep decisions.

    For galaxies, globulars and nebulas my 5" an 8" scopes do well with my 14.5mm eyepiece. My friend has an 18" obsession scope. Again his 13mm Televue is the favourite for these. Try / borrow in the 13 - 15mm range and see what you like.

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    Default Re: premium ep decisions.

    I suppose I could go for an 82* 1.25" if I go with a 14-16mm ep. Naaaaaaler naaaaaagler keeps going thru my head but ppl tell me the Pentax is every bit as good, even sharper even. Plus nagler is more expensive and means another week of saving, I'm not going for second hand as I've been trawling ebay and have seen none in the uk used, I wouldn't trust people on astrobuyandsell with £300 of my cash, I'm terrified of getting ripped off, with ebay you get excellent protection.

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    Default

    Naglers do show up on eBay occasionally - that's where I got most of my eyepiece collection from over the years, so it's worth keeping an eye out.

    The pentaxes seem to get good reviews, but I haven't had a chance to try one myself .

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    Default Re: premium ep decisions.

    Hi Brian,

    I'm going to throw a monkey in the wrench here and suggest that you stick with the X-Cel LX line and get the 18 mm. I own it and it is just as good as my 25 and 9mm X-Cels. It is my preferred EP for Globulars. You already know they are great EPs. Why lay out the extra dough? There's always something else to spend it on.

    Just sayin',
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    Default Re: premium ep decisions.

    Quote Originally Posted by jaetea View Post
    Hi Brian,

    I'm going to throw a monkey in the wrench here and suggest that you stick with the X-Cel LX line and get the 18 mm. I own it and it is just as good as my 25 and 9mm X-Cels. It is my preferred EP for Globulars. You already know they are great EPs. Why lay out the extra dough? There's always something else to spend it on.

    Just sayin',
    JT
    I agree but I want a wider fov than 60* I know I can get 70 - 82* ep for a lot less but in my fast scope they can suffer a bit from aberration. I'd rather spend the cash and get one in never going to upgrade.
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    Default

    That's one reason I ended up going for (used) Naglers - you get the typical Televue performance, and the confidence that they'll work well in whatever scopes you end up with - in my case, from an f10 SCT to an f5 refractor.

    Buying used managed to keep the cost down to something manageable .
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    Default Re: premium ep decisions.

    Well my 2 cents...
    I sold my few Naglers about 10 years ago because as I aged I just found the ultra wide angle views to be uncomfortable to observer with and dropped back to 68-70 degree eyepieces... I now use mostly Pentax XW's for high to medium power and Panoptics for low power

    I own both the 14 and 20m mm Pentax XW...(200x and 140x in my main scope) both are fantastic BUT..both do show a hair of field curvature in SCTS along the extreme edge (5% ?) ... The 7 and 10 do not..

    in my 8 inch Sct they are killers at 145x and 101x with almost no field curvature...

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    Default Re: premium ep decisions.

    Now I'm swithering, being ad impatient as I am lol. I was looking at the explore scientific 14mm 82* it seems to tick all my boxes. Wide field 1.25" good reviews and a LOT less $$$ than the Pentax and nagler. Are they "worth" £/$ 100 less or am as as well paying the extra for "the best"?
    Philip F likes this.
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