://chezaubert.net/froggy2.jpg
The sun tracks are really more of a secondary decoration than the point of
the photos.
Jack Aubert
-Original Message-
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of rmallett
Sent: Monday, May 05, 2014 2:42 PM
To: Bill Gottesman; John Foad
Do I see a retrograde? (Same azimut, different moments). Where is
this picture made?
Thibaud
At 21:33 4-5-2014, Barry Wainwright wrote:
The BBC has a series of pictures taken by pinhole camera at
http://www.bbc.co.uk/news/in-pictures-27221895
Image 7 is described thus:
John Rigg: This is a
:11 AM
To: Sundial list
Subject: Re: Sun tracks
Do I see a retrograde? (Same azimut, different moments). Where is
this picture made?
Thibaud
At 21:33 4-5-2014, Barry Wainwright wrote:
The BBC has a series of pictures taken by pinhole camera at
http://www.bbc.co.uk/news/in-pictures-27221895
Image
it was vertical or horizontal.
John
-Original Message- From: Thibaud Taudin Chabot
Sent: Monday, May 05, 2014 10:11 AM
To: Sundial list
Subject: Re: Sun tracks
Do I see a retrograde? (Same azimut, different moments). Where is
this picture made?
Thibaud
At 21:33 4-5-2014, Barry
On 05/05/2014 14:03, Bill Gottesman wrote:
Here is what I think:
The can is laying on its side with its axis oriented north-south. A
pinhole is made on the west side of the can (assuming this location is
in the northern hemisphere, and that the zenith of the sun is toward
the south),
The BBC has a series of pictures taken by pinhole camera at
http://www.bbc.co.uk/news/in-pictures-27221895
Image 7 is described thus:
John Rigg: This is a six-month exposure using a pinhole camera made from an
empty soup tin and photographic paper, not film. The resulting image is then
scanned
