NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Which diameter of the sun in digital photos ?
From: Bill B
Date: 2009 Aug 21, 18:33 -0400
From: Bill B
Date: 2009 Aug 21, 18:33 -0400
> From: Marcel Tschudin> I fear to put an other hand-held filter in front since I > have to measure the distance to the horizon which still must be > visible, since the main purpose is to measure the sun's distance to > the horizon. I have so many only faintly visible sun pictures > confirming the obtained scale that I'm fairly confident that the value > corresponds to what the camera 'sees'. Cokin, and I am sure others, make filter frames in which a square filter will slide, and graduated filters. Or just use a dense filter and slide it in the filter mount to reduce the sun without affecting the horizon. Bill B. --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---