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Thread: Help with first time buying eyepieces.

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    Default Re: Help with first time buying eyepieces.



    Hello and welcome Scott, here is something that may help explain choosing eyepiece focal lengths: Article: What Astronomy Eyepieces should I get for my Telescope?

    Personally I would recommend taking some time and get used to using your telescope for a bit before buying new eyepieces.
    Luckily the long focal length of the telescope will be easy on eyepiece styles.
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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/Achro thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)
    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind.

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  2. #12
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    Default Re: Help with first time buying eyepieces.

    Do you have any suggestions on what to do to get used to my scope?

    I guess I was just thinking having a higher power would be cool when the moon comes back out and of seeing what having a larger exit pupil was all about.

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    Default Re: Help with first time buying eyepieces.

    Quote Originally Posted by scotth View Post
    Man, I was playing around on Agena and added the 18mm BCO and the 32mm BCP along with the Q-Barlow, which totaled $217.

    I thought that was a little steep so I was thinking of just getting the 32mm BCP and Q-Barlow, which I think would give me effective focal lengths of 32mm, 25mm, 14mm and 11mm and only cost $140.

    Then I realized there is a set including the Q-Barlow, the 32mm Plossl, and the 18mm, 10mm, and 6mm orthos for only $207!

    Is that deal too good to pass up or a little overboard for me considering I've only a couple observation sessions under my belt?
    It is a great set and the price is ridiculously appealing. I just picked this up for myself and had a chance to try it out in my F/5 Dob, and liked what I saw. That being said, while I agree and I'd normally recommend that it's probably better to get some experience first before diving into new EP's, however this is a deal on really good ep's where I feel you can't really go wrong.

    Would I even be able to really use the 6mm or is that too small an exit pupil?
    Not too small. It should be right on the cusp, and will become a situational eyepiece for when viewing conditions are very good and you want that extra magnification. So it will still be useful, but you probably won't be able to use it a lot.

    Is there an advantage to having a dedicated 10mm Ortho vs using the 2.25x Barlow on my 25mm Plossl?
    I think there's two schools of thought here. The first is pro-barlow because they are relatively inexpensive, will provide a whole bunch more focal lengths in your kit and in some cases can be used to preserve longer eye relief at small focal lengths with EP's that feature good relief. The second school of thought is that, well, its just more glass between you and your target where every extra surface potentially degrades performance and a cheaply made barlow doubly so. Personally I prefer dedicated focal lengths, but that being said I do have a GSO made APO barlow in my kit (https://agenaastro.com/gso-2-5x-apo-barlow-lens.html) and it does get used.

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    Default Re: Help with first time buying eyepieces.

    Quote Originally Posted by scotth View Post
    ...

    Then I realized there is a set including the Q-Barlow, the 32mm Plossl, and the 18mm, 10mm, and 6mm orthos for only $207!
    ...
    Hello Scott,

    this $207 Baader Q-Turret Set is really a good deal which should not be ignored.
    From this Set, I have the BCO 6mm, 10mm, and the Barlow, all of them high rated.

    For the glass wearers, the best comfortable EPs are those with the eye relief of 20mm - that's the good news.
    The bad news is, as lots of these long eye relief and wide field EPs have already a Barlow or Smyth in their nose,
    barlowing them with one more Barlow does not make sense.
    So just to be sure, check out the optics design of the EPs,
    and mind maybe the "pseudo-Masuyama-clones-of-Zeiss-Astroplanokular-barlowed", which pop up on the markets labelled with different and otherwise nice sounding brand names.

    Best,

    JG
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    Default Re: Help with first time buying eyepieces.

    Quote Originally Posted by scotth View Post
    Thanks for all of the input so far. Still mulling it over.

    My wife wears glasses. Does that mean that high power orthos and plossls are essentially unusable for her and that I would be better off getting the 18mm Ortho with a Barlow to preserve a useable eye relief or just using a Barlow with my 25mm Plossl? Or, is there a better option for glasses-usable eye relief around 10mm focal length?
    The BCO set for $207 is really an incredible deal. I got this set last year on sale for much higher price and could not be happier with performance. 32mm Plossl which comes with set is of good quality and has plenty of eye relief for your wife. She can also barlow it to get 14mm FL for higher power views. 18mm Ortho can also be used with glasses and barlowed to 8 mm. I have a very complex prescription and observe with glasses on. I found that 32mm and 18mm EPs can carry most of observing session and on occasion I take glasses off to use 10mm or 6mm Orthos. Switching EPs is fast and convenient with EP turret included in the set.
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    Default Re: Help with first time buying eyepieces.

    Thanks guys. I caved and went for the set as it really seems like a good base to start from if and when I ever want to specialize or upgrade to other single eyepieces and with all of the good reviews from people who paid $80 per it seemed like too good of a deal to pass up.

    I still am interested to hear some elaboration for those users who suggested I take some time and get used to my scope. So far I have using the GoTo down and have enjoyed seeing clusters and nebulas and a little of the moon. Definitely craving some more magnification for the moon and to Mars so I went for it.
    sketrip and Gabby76 like this.

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    Default Re: Help with first time buying eyepieces.

    When we recommend people take their time it is usually because people starting out assume that their telescope will give them best views of everything that they imagine they can see
    It also gives a person time to really decide what types of objects they enjoy looking at. Do you like the widefield views or more close up detail things such as that.
    Learning the limits of your telescope and eyepieces tells you where you need to focus your eyepiece/ accessory/ telescope purchases so get the most for you out of the hobby

    Enjoy the new eyepieces, I am sure you will enjoy them
    sketrip and Bigzmey like this.
    Refractors: Antares 105 f/15, Bresser 102XL f/13.2, Celestron 102 f/6.5, 2-150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, Vixen SD115s f/7.7
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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/Achro thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)
    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind.

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    Default Re: Help with first time buying eyepieces.

    Quote Originally Posted by scotth View Post
    Thanks guys. I caved and went for the set as it really seems like a good base to start from if and when I ever want to specialize or upgrade to other single eyepieces and with all of the good reviews from people who paid $80 per it seemed like too good of a deal to pass up.

    I still am interested to hear some elaboration for those users who suggested I take some time and get used to my scope. So far I have using the GoTo down and have enjoyed seeing clusters and nebulas and a little of the moon. Definitely craving some more magnification for the moon and to Mars so I went for it.
    Smart move! This set will cover all your observing needs nicely. We always suggest beginners to take it slow because we all bought some junk at the beginning we later regretted. You are save with this kit however, this is good quality stuff.
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    Default Re: Help with first time buying eyepieces.

    Quote Originally Posted by Gabby76 View Post
    When we recommend people take their time it is usually because people starting out assume that their telescope will give them best views of everything that they imagine they can see
    It also gives a person time to really decide what types of objects they enjoy looking at. Do you like the widefield views or more close up detail things such as that.
    Learning the limits of your telescope and eyepieces tells you where you need to focus your eyepiece/ accessory/ telescope purchases so get the most for you out of the hobby

    Enjoy the new eyepieces, I am sure you will enjoy them
    I guess what I'm struggling with is that it's hard to know if I prefer looking up close at the moon or looking at a big wide field view of a DSO since I've never had anything but this 25mm Plossl. So far I forsee enjoying looking at solar system objects as well as DSOs equally but I think I will be able to get a better idea with these new eyepieces.

    Other than the immersion of the FOV extending in to my periphery, is there a functional advantage to a wider FOV eyepiece? I've heard that it helps a lot if you don't have a GoTo, but otherwise? Are there objects that are larger than the AFOV I will get with the 32mm Plossl? Maybe the advantage is that you can have a larger AFOV at a higher magnification?

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    Default Re: Help with first time buying eyepieces.

    There are some very large objects, The Pleiades or the Veil nebula are quite large so a large AFOV/ TFOV will definitely help.
    With manual mounts a large AFOV will definitely help to keep objects in the FOV, with a goto mount this is not as necessary but there are a lot of observers who like to have a large "frame" of sky around an object.
    j.gardavsky and scotth like this.
    Refractors: Antares 105 f/15, Bresser 102XL f/13.2, Celestron 102 f/6.5, 2-150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, Vixen SD115s f/7.7
    Mounts: Manfrotto 028B/ 055PRO, Celestron SLT, Celestron CG-5/ Argo Navis, Stellarvue M2C, Vixen SXP Binoculars: Celestron Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/Achro thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)
    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind.

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