Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Canon G9 Point and Shoot for Sun CN
    From: Norm Goldblatt
    Date: 2015 Jun 26, 22:34 -0700

    If you promise not to laugh-   I've been following Jupiter-Venus distance for the  past month and I had the same problem with focus.  Now, if truth be known, I'm using my iPhone 5s. Turns out it has a devil of a time focussing on a star. I downloaded a couple of camera apps which allow fixing the focus and it made a tremendous difference.  

    In terms of CN,  I've tried to calibrate the sensor by snapping a pic of Arcturus and Ursa Major.  I compared the pixel positions of all the stars with respect to each other, and the calibration of pixels per degree was dismally uncertain.  Looking into it more now, but I suspect it's pincushion distortion.   The stars did fill the entire field.  I'll try to center the bowl in the field and see what I get in terms of consistency.  

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site