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  1. #1
    maflu's Avatar
    maflu Guest

    Default Which 2" Accessories to buy for 8" LX200?



    Hello,

    I have a classic Meade 8" LX200 and would like to buy several 2"
    accessories.

    A 2" diagonal:
    - Astrophysic MaxBright Diagonal with ADASCT adapter
    - Televue Everbrite (but I do not know if I need an adapter here)
    Which is best quality? Other ideas?
    Maybe this will be too long for the mount if a focal reducer is
    installed as well...???

    A 2" eyepiece:
    - 40mm Pentax
    Other ideas?

    A 2" lunar filter. A filter to enhance DSOs (do not know which filter
    to buy here) for astrophotography with a DSLR.
    Please advise me for these filters.

    A 2" barlow (do not know what to buy here with a good quality).

    Thank you for your help.

    Cheers

    Ted

  2. #2
    Steve Sherman's Avatar
    Steve Sherman Guest

    Default Which 2" Accessories to buy for 8" LX200?

    maflu wrote:

    Check out Williams Optics diagonal Part #WA-SCT-DIG2.
    About $130.00. It is very good, both optical and
    mechanical.

    As for the 40mm pentax - the XL are gone, so you will
    need to go with the new XW model at about $550.00.

    You can use the money you saved on the diagonal and
    get a 31mm Nagler T5 or save more and get a 35mm Panoptic.

    A 2" eyepiece is not of much use on the moon.

    Steve


  3. #3
    Jon Isaacs's Avatar
    Jon Isaacs Guest

    Default Which 2" Accessories to buy for 8" LX200?

    >>

    Have you considered the focal reducer route? Less expensive, flatter field.

    jon

  4. #4
    maflu's Avatar
    maflu Guest

    Default Which 2" Accessories to buy for 8" LX200?

    Jon Isaacs wrote:

    No but I am nearly a beginner here. Could you please explain the pros
    of this route? What I am looking for for visual use is a wide field and
    a high quality image.
    Thank you
    Cheers

  5. #5
    Jon Isaacs's Avatar
    Jon Isaacs Guest

    Default Which 2" Accessories to buy for 8" LX200?

    >No but I am nearly a beginner here. Could you please explain the pros

    The reducer-corrector shortens the effective focal length of the scope from F10
    to F6.3. It also "flattens the field."

    What is most important for you is that it allows you to use 1.25 inch eyepieces
    and get the maximum field of view.

    In an 8 inch F10 SCT, a 32 mm Plossl with a 50 degree FOV will provide the
    maximum FOV for a 1.25 inch eyepiece, 0.8 degrees at 63.5X.

    With the reducer-corrector, that same eyepiece will provide a 1.25 degree FOV
    at 40X. Not too bad....

    One can combine a focal reducer with 2 inch eyepieces but then Vignetting (the
    center of the field of view is bright, the edges are dark) can become a
    problem.

    Uncle Rod's pages at: members.aol.com/rmollise

    have lots of good information for SCT users of all levels.

    Also, consider Uncle Rod's book, "Choosing and Using a Schmidt Cassegrain
    Telescope." After reading that, you should understand all your options and how
    to get the most out of your scope. I think it would be a good investment that
    would quickly pay for itself.

    Jon






 

 

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