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  1. #1
    Iordani's Avatar
    Iordani Guest

    Default 90 degree prism?



    Just bought a (my very first) Vixen GPDX mount.
    Living at 62 degree north I find it extremely uncomfortable to use the polar
    finder scope. Looking for a 90 degree prism to make my go at astro
    photography somewhat more pleasant.
    I don't want to lose any field of view.

    Tips and/or pointers greatly appreciated.




  2. #2
    Iordani's Avatar
    Iordani Guest

    Default 90 degree prism?

    Iordani wrote:



    (sorry for double-posting, just want to raise the question again)

    I have tried to solve this with a 90 degree prism but either I loose to much
    FOV or I can't reach focus at all.

    Am I the only one with this problem? I have tried 40-50 degrees and it's
    still a pain... How do you folks do it? All using the dr ift method?
    I use a Nikon D70 coupled with a 300 mm (or less) lens and find I can do
    well with just polar alignment.

    Realising I belong to the 62+north minority, I still want to do "it".
    (comfortably)

    TIA again

 

 

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