Moments in Time and Photographs
Most recent answer: 12/12/2014
- Kenneth Rushforth (age 65)
England.
Dear Kenneth,
You cannot ignore the shutter speed. Objects you want to photograph emit photons, either by reflection or by self illumination. There are a finite number of photons per second that strike the film or electronic sensors in your camera. As you keep reducing the exposure time you will get fewer and fewer photons. Eventually you don't accumulate enough to make a decent replication of the object. Too fast a shutter speed and you don't get any! So a photograph must be an average representation of the image over a finite time: nothing instantaneous. It that sense a photograph is a time blurred representation of the object.
I'm not sure I understand your philosophical problem about the meaning of time. Perhaps it is vaguely related to Zeno's paradox and has to do with expressing a point in space-time as the limit of an infinite sequence.
LeeH
(published on 12/12/2014)
Follow-Up #1: limit of short exposures
- Mehran (age 64)
Miami
Mehran- Thanks for this explanation. And welcome back to the site.
Mike W.
p.s. Rebecca W. followed your advice and fixed the probelm with our question box.
(published on 01/02/2015)
Follow-Up #2: fixed text box
- Mehran (age 64)
Miami
yes
(published on 01/06/2015)