| Author | Thread |
|
|
09/06/2008 12:12:14 PM · #1 |
Hi,
The concept seems simple, but I thought I'd check:
If I'm using one flash, and need more light, will two flashes double the available light (and three triple it)?
What gets me is when I compare it to ten flashlights at night and everyone aims their flashlights at one point, it doesn't seem to be ten times the light, which makes me think there's something else happening?
Thanks. |
|
|
|
09/06/2008 12:17:02 PM · #2 |
two flashes double the light
four to double it again
eight to double it again
sixteen to double it again
....... |
|
|
|
09/06/2008 12:21:36 PM · #3 |
Aaaaah. yep, thanks,
I forgot about f-stops/intensity being the square of distance or quantity...
|
|
|
|
09/06/2008 12:40:24 PM · #4 |
| As long as you keep the distances equal. |
|
|
|
09/06/2008 12:44:12 PM · #5 |
Bah, why discuss such primitive lighting methods. I just set my subjects on fire, gives me all the light I need, no need to aim lights, and strangely I've never had to pay a model yet...
|
|
|
|
09/06/2008 12:45:45 PM · #6 |
|
|
|
09/06/2008 01:02:26 PM · #7 |
Originally posted by Patrick_R:
togtog..... seek help? |
No sorry, I'm not seeking help at this time, I think I do well on my own. But if I am ever interested in taking on an apprentice I will let you know first thing!
|
|
|
|
09/06/2008 03:15:36 PM · #8 |
Originally posted by fir3bird:
two flashes double the light
four to double it again
eight to double it again
sixteen to double it again
....... |
That would still equal 4 flashes 4 times the light, etc. Double a double and you have four. 2 X 2 = 4.
And 10 flashes, are 10 times the light of one flash, providing they are all equal and equal in distance from the lighted object.
Why the original poster does not "see" 10 times the light, is because our vision compensates for changes in lighting intensity. That little iris in our eyes does an amazing job for us, without us even noticing.
If you really want to test it out, put the camera in manual mode. Then take the exposure without changing anything but the available light. The difference will show, even if our eyes don't see it. Much like a back lit photo. It looks great to our eyes, but the camera sees it differntly because our eyes change so quickly as we look around, we do not notice how wide the dynamic range really is. |
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 08/17/2025 05:49:02 PM EDT.
