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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Eyesight dangers using telescopes was: [8760] Basics of computing sunrise/sunset
From: Douglas Denny
Date: 2009 Jun 25, 13:16 -0700
From: Douglas Denny
Date: 2009 Jun 25, 13:16 -0700
Important correction to make clear before confusion reigns: The exit pupil of an astronomical telescope is the image size of the objective lens itself which forms the aperture stop. Should read:- The exit pupil of an astronomical telescope is the image size of the objective lens itself BY THE EYEPIECE - which forms the aperture stop. Douglas Denny. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
