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[req] Eye Pieces - live viewing before decision made

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  • 02-05-2015 1:10pm
    #1
    rolion
    Closed Accounts Posts: 3,362 ✭✭✭


    Hello,

    I'm trying to upgrade me eye pieces.
    I'm using a Celestron C8 Starbright XLT Telescope OTA.
    I have 1.25" and I am going for the 2".
    I will trade or sell my current set and looking to get something in range of 8x - 14x - 24x - 30x.

    Few key points, as explained by Ktech:

    -good eye relief
    -multicoating
    -multiple glasses
    -size/weight matter for my scope / mount

    Kind of short stopped at TeleView and / or Explore Scientific.
    Beside the price (I have a very strict budget now) I don't quite understand / visualise the field of view:100,68,58 degrees angle

    Not lastly, Stephen said that he can source a best recommendation based on my current scope, range, power, capacity / capabilities as some EP does not bring the maximum performance out of a scope, mine been f/10 is a "slow" one !?

    My Q is there a place or someone that uses those EP so I can see them live before placing an order ?
    Cannot ask someone to purchase them and/or have it in stock for me to check, i'm guessing someone are using them already ... :)

    I'm waiting for my scope to be repaired so I have patience in sourcing the b€st solution.

    Many thanks .


Comments

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    #2
    shedweller
    Closed Accounts Posts: 4,029 ✭✭✭shedweller


    From the little i've learned i have found that faster scopes place more demand on eyepieces and make it harder for them to keep an image clean at the edges. Slower scopes have less aberration etc. so you could use a bigger range of eyepieces.


  • Options
    #3
    shedweller
    Closed Accounts Posts: 4,029 ✭✭✭shedweller


    From the little i've learned i have found that faster scopes place more demand on eyepieces and make it harder for them to keep an image clean at the edges. Slower scopes have less aberration etc. so you could use a bigger range of eyepieces.


  • Options
    #4
    rolion
    Closed Accounts Posts: 3,362 ✭✭✭rolion


    Thanks.

    I've done the maths and based on my C8 output OTA diameter, the 2" will be fine.
    Not sure about the FoV, i will stick with the 82" so far.

    I'm going to order few EP made by Explore Scientific.
    I guess... 30mm ,18mm and 11mm.
    Im I going wrong with the choice here !?



    Found the below links that assist me in making me decision:

    Explore Scientific Eye Pieces

    Eye Piece's Exit Pupil

    Very good discussion about the 82" EPs

    Basic about Eye Pieces in SCTs

    EP magnification

    Celestron KB


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