NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: NG's "Midnight Fun"
From: Peter Fogg
Date: 2010 Jun 11, 12:18 +1000
From: Peter Fogg
Date: 2010 Jun 11, 12:18 +1000
Herbert Prinz wrote:
How do you explain the steadily increasing sun diameter towards the sides of the picture?
Two possible explanations:
1. Diffusion - to both sides the sun's image appears as more diffuse, thus apparently larger, compared to the rather clearer sun at the centre.
2. Apparent distortion. I say apparent because wide-angle lenses take an arc and record that onto a plane, which also gets displayed as a plane. So objects towards the edges tend to be recorded in 'splayed-out' fashion - an inelegant expression but can't think of a better way to put that.
