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    kramuse's Avatar
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    Question C8 S-GT Eyepieces



    Hello folks, I am new here and I need to thank everyone for their knowledge and sharing them

    The general rule of thumb I follow for getting eyepieces, the better the magnification, the better the FOV should be and that's how I have based my selection on up till now. Is this an okay way to go about it?

    I am getting a C8 SGT (SCT) scope soon, based on the reviews, everyone was mentioning 60-70* FOV was best on their C8 SCT. After doing some research, was wondering if the following eyepieces would go well with it?

    9mm TeleVue Nagler Type 6 (82*)
    19mm TeleVue Panoptic (68*)
    32mm TeleVue Plossl (50*)

    They are all 1.25" and I also intend to use them with a Coronado PST DS as well. Appreciate everyone's feedback/thoughts on the matter. Thanks!

    Clear skies y'all

  2. #2
    JuanM's Avatar
    JuanM is offline HYPER GIANT
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    Quote Originally Posted by kramuse View Post
    The general rule of thumb I follow for getting eyepieces, the better the magnification, the better the FOV should be and that's how I have based my selection on up till now. Is this an okay way to go about it?
    Not sure what you mean exactly but, as per your selection, it looks to me like : "the higher the magnification, the largest the FOV should be", am I right ?

    Well, IMHO, yes and no. Yes, you will love to have large FOVs at high powers but, no, you don't have / won't like to sacrifice FOV at low powers. And don't forget to have large eye relief as well !

    Just to give an example, with your scope's focal length of 2032mm, that 32mm TV plossl with only 50° of FOV, will yield just 47' of real FOV. However, a 70° EP, will give you 1° 6' (70° / 63.5x), if I'm not mistaken. This will make a huge difference when looking at those faint extended objects which require wider FOVs.

    You may also like to read this thread:
    http://www.astronomyforum.net/telesc...eyepieces.html

    Hope it helps, but let's wait for others' opinions too !

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    No YES and NO about it..the higher the magnification the smaller the FOV will be ..
    That is not saying a 9 mm Plossl will have the same FOV as a 9 mm Nagler... because a 82 degree eyepiece will have a larger FOV then a Plossl..

    I run 8 and 11 inch Scts...and the highest power eyepiece I even carry in my case for the C8 is a 8.5 mm Pentax ..and it honestly does not gate a lot of use under my Normal skies anyway..

    I own all 68-70 degree FOV eyepieces with the exception of the 60 degree FOV Pentax mentioned above..the 10 mm does get regular use....

    BUT I find myself using my 26,31 and 35 mm eyepieces much more then I do my 10 13 17 & 20 ...I'm into DSO's however...

    If I got a Nagler I'd get a 31

    Bob G
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