Hi, I read up on this stuff before the total eclipse of 1999 in Pasachoff's book, and although I didn't get any decent photos of my own I did learn a few things. The book includes examples similar to this one. The moon and the sun move at reasonably constant speeds relative to the earth, so we know how long it takes for the sun to travel its own diameter. It's also quite easy to work out the how much of the frame the sun will occupy for a given focal length. Since the start and end times of the eclipse are predictable, this information allows you to calculate when to start shooting, and how long the interval between exposures needs to be. It also lets you plan in advance roughly whereabouts in the frame the line of suns will be. That photo with the Golden Gate bridge must have taken an awful lot of planning and experience of eclipse photography.
"The Cambridge Eclipse Photography Guide" by Jay Pasachoff and Michael Covington is full of information. Unfortunately there are no details of exlipses after 1999, but the technical photography information is very comprehensive. --- Bob mailto:[EMAIL PROTECTED] Wednesday, June 12, 2002, 7:44:32 PM, you wrote: > I wasn't refer to the consistency of the spacing, but the degree of spacing. As in >how did he/she know how long to make each exposure so that each image of the sun did >not overlap or be too far > apart. > "Paris, Leonard" <[EMAIL PROTECTED]> wrote: An interval timer that took a >picture every n seconds. > Len > I wonder what calculations the photographer used to get the nearly pefect > spacing of each exposure? > "Daniel J. Matyola" wrote: There is a great photo > of this week's eclipse on today's Astonomy Picture of > the Day: > http://antwrp.gsfc.nasa.gov/apod/astropix.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
