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Thread: Which of these EPs should I pick up next?

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    Nimitz's Avatar
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    Default Which of these EPs should I pick up next?



    I'm looking to pick up another Celestron Ultima LX EP and trying to decide which focal length i should get given what I already have ....

    My available choices are: 13mm, 17mm, 22mm or 32mm

    As you can see I already have a 12.5mm Plossal, 15mm Celestron Luminous, 21mm Ultimate Duo & a 42mm GSO.

    I'm thinking maybe the 13mm would be best since it would give me a higher power 70 deg EP but maybe its just too close to the 15mm I already have. The 32mm would fit nicely between the 21mm & 42mm so that's also possible ...

    Anyone want to point me one way or another?
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    Default Re: Which of these EPs should I pick up next?

    Quote Originally Posted by Nimitz View Post
    I'm thinking maybe the 13mm would be best since it would give me a higher power 70 deg EP but maybe its just too close to the 15mm I already have. The 32mm would fit nicely between the 21mm & 42mm so that's also possible ...

    Anyone want to point me one way or another?
    Would not the baader zoom fill that gap for you?
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    Default Re: Which of these EPs should I pick up next?

    I would use your current ep's on a variety of targets to compare and see what each does best and where you are most lacking in capability. Your current collection has a good spread of performance traits and seems well balanced, so I think it would come down to wanting something between the 42mm and the 21mm or another Ortho between the 21 and 15 if you want a high contrast and throughput ep in that range. If you are happy with what Ultima Duo, Luminos, and zoom do in that range, you could consider splurging on a premium ep to replace either the Ultima or the Luminos, just to satisfy your curiosity about high end ep's. For the price of an upper-midrange ep, you can get a decent camera if you want to try video astronomy.
    AbbN and j.gardavsky like this.

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    Default Re: Which of these EPs should I pick up next?

    thx all. i did a fair amount of research before buying what I have and was convinced that with an SCT, buying the so called 'high end' EPs that are kind of mandatory with refractors really didn't get you much. The Luminous, Ultimate Duo & Ultimate LX series were all indicated to be superior performers in an SCT. Without a direct comparison on the same object by just switching out EPs like maybe at a star party I guess there could be some doubt but my current curiosity is not peaked enough for me to buy one to see for myself .... . No real interest in photography either at this point, I don't get enough direct observing time as it is to want to do any video or still work ... no one really to show it to anyway ...
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    Default Re: Which of these EPs should I pick up next?

    If you wait a couple of weeks, Explorer Scientific normally put their eyepieces on sale from Thanksgiving (USA) till New Years.

    I would consider the: Explore Scientific 30mm 2" 82°
    https://www.bhphotovideo.com/c/produ..._eyepiece.html
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    Default Re: Which of these EPs should I pick up next?

    There is a bit of gap between 21mm and 42mm so I would pick a nice EP around 30mm.

    I don't think you need anything on the other end. Your KK Ortho should cover high power views nicely. However, if you find Ortho's view a bit too narrow I would suggest ES 82 11mm EP.

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    Default Re: Which of these EPs should I pick up next?

    You have a good selection of low and medium power eyepieces, get the hyperion barlow for your zoom for higher planetary powers. Your scope in your location should be capable of 400x and maybe more. Get ready for Mars in 2018.
    Also good for double star splitting
    Newtman but some refractors allowed.

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    Default Re: Which of these EPs should I pick up next?

    Quote Originally Posted by Pauls72 View Post
    If you wait a couple of weeks, Explorer Scientific normally put their eyepieces on sale from Thanksgiving (USA) till New Years.
    I would consider the: Explore Scientific 30mm 2" 82°
    https://www.bhphotovideo.com/c/produ..._eyepiece.html
    I agree with this. It's a fabulous lens and one of my favourites but it's heavy (over 2 lbs!). I bought mine a couple of years ago when they had this sale - it was on sale in Canada as well at that same time

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    Default Re: Which of these EPs should I pick up next?

    appreciate the feedback everyone & i think I'll be going with the 32mm Ultima LX. I'll probably also look at a high power, wide FOV EP after that in the 8-11mm range. No need to buy the ES or TV $300+ highly corrected type EPs with my SCT ...
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    Default Re: Which of these EPs should I pick up next?

    Quote Originally Posted by Nimitz View Post
    appreciate the feedback everyone & i think I'll be going with the 32mm Ultima LX. I'll probably also look at a high power, wide FOV EP after that in the 8-11mm range. No need to buy the ES or TV $300+ highly corrected type EPs with my SCT ...
    As an experiment I picked up an Antares 6mm 70 FOV. I have been fairly pleased with the performance in my SCT
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