Hi Ruden and Tom,
The pinhole photography effect is interesting and would be fascinating to
watch.
Thanks for your help,
Roderick Wall.
-Original Message-
From: ruben nohuitol
Sent: Friday, February 17, 2012 10:28 AM
To: sundial@uni-koeln.de
Subject: about the pinhole diameter
If
Speaking
of the "dark room" photograph effect, I discovered I had the
camera obscura effect, but I didn't know what it was at first.
The difficulty came from the small size (only 3/16"
approximately) of the sun spot on the target paper. I noticed
w
If it's usefull for you the pinhole of my analema (on the roof) is 3/16" which
hapened to be very good. Let me tell you that, today, feb 16, even when is
partially clouded, the sun beam went into the room, making a "dark room"
photography effect, thus, even when the direct mark was 1 1/2" in the
