NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Scope position relative to frame 2
From: Bill B
Date: 2007 Jan 26, 21:36 -0500
From: Bill B
Date: 2007 Jan 26, 21:36 -0500
Sorry to be thick as a brick on this. I did find an article Frank had posted, "Sextant Telescope Collimation," 10-18-05 I guess my handicap is not being able to translate the word picture into a mental image. If I superimpose two images in the center of the scope and keep the directly-viewed image centered and rotate around scope's axis, the image viewed via the index mirror will slide left or right using a plumb sextant frame as a reference. What I suspect is a movement more like assembling a panoramic from several camera photographs. If the scope had cross hairs, when the sextant frame was in the normal plumb position, we could label the horizontal cross hair "x" and the vertical crosshair "y". With the two images superimposed at the crosshair junction, the "rotation" motion needed would slide the bodies to either side of the y crosshair while keeping them on the x crosshair. Equal distance from the y crosshair of the image nearest the y crosshair should create equal separation between the bodies. Do I have it yet? Thanks for your patience. Bill --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---