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
    or...
       
    Reply
    Re: Photographic lunars
    From: Frank Reed
    Date: 2009 Dec 13, 20:00 -0800

    "I'm a bit doubtful about handheld shots on land providing sharp enough images, if they need 1/5 second. Maybe his proposal for storing a stream of many such images, in the hope that some will show little motion, will work, if the camera is capable of processing and storing those high-resolution images fast enough."
    And
    "First, we have to be aware that, if stars need a 1/5 sec exposure to show
    them up, there's no hope of taking such a picture from at sea, with the
    inevitable motion underfoot."


    Amateur astronomers do similar sorts of things all the time (not for observer motion, but for air motion). For example, for high-resolution planetary photography, which is a highly-developed and sophisticated activity these days, the preferred tool is digital video. Then frames can be selected (and this is usually done automatically) during moments of perfect "seeing". An automated system on a boat could take images more-or-less continuously, hundreds per minute, and catch those moments that just happen to be stable. Even if you only get one good shot in five hundred, that amounts to roughly one hundred accurate and usable photos in an average night. Of course, that's a highly automated system, and maybe therefore not much fun. But none of this digital photography navigation is possible without a computer so you might as well consider complete automation.

    -FER


    --
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList+unsubscribe@fer3.com
       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

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

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

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

    Email Settings

    Posting 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