Even though we ARE Nikon lovers,we are NOT affiliated with Nikon Corp. in any way.

English German French

Sign up Login
Home Forums Articles Galleries Recent Photos Contest Help Search News Workshops Shop Upgrade Membership Recommended
members
All members Wiki Contests Vouchers Apps Newsletter THE NIKONIAN™ Magazines Podcasts Fundraising

Why Shoot at ISO 100?

jbloom

Wethersfield, US
7735 posts

Click to send email to this author Click to send private message to this author

"RE: Why Shoot at ISO 100?"

jbloom Gold Member Awarded for the continuous and generous sharing of his high level expertise and his always encouraging comments in several forums. Donor Ribbon awarded for his generous support to the Fundraising Campaign 2014 Nikonian since 15th Jul 2004
Tue 12-Aug-08 11:16 AM

Suppose, for example, you want to fill the shadows on a face with an amount of light that makes the shadows one stop below the sunlit part of the face. To do that, the amount of light you need is dependent on the brightness of the sunlight on the face. It is purely a ratio of the main light (sun, in this case) to the amount of fill wanted.

The amount of flash power you need to achieve that amount of light on the face is dependent on flash-to-subject distance but is not dependent on camera settings. With the flash set up in this example, if you adjust your camera for f/16 and the sunlit parts of the faces are properly exposed, the filled parts will be exposed one stop below. Similarly, if you set aperture to f/11 and adjust shutter to properly expose the sunlit parts, leaving the flash set to the same settings and at the same distance, the filled part will still be one stop down.

So again, the amount of fill flash needed is dependent only on the brightness of the sun (or whatever the main light source is).

Now, when the flash is the main illumination, it's a wholly different case. Then there is direct relationship between camera settings and the amount of flash needed. But not for fill flash.

-- Jon
Wethersfield, CT, USA
Connecticut High School Sports Photos

Visit my Nikonians gallery.

This is a hot, active topic! Why Shoot at ISO 100? [View all] , brad_nikon , Fri 08-Aug-08 05:50 PM
Subject
ID
Reply message RE: Why Shoot at ISO 100?
1
Reply message RE: Why Shoot at ISO 100?
2
Reply message RE: Why Shoot at ISO 100?
3
Reply message RE: Why Shoot at ISO 100?
4
Reply message RE: Why Shoot at ISO 100?
16
Reply message RE: Why Shoot at ISO 100?
5
     Reply message RE: Why Shoot at ISO 100?
6
          Reply message RE: Why Shoot at ISO 100?
8
Reply message RE: Why Shoot at ISO 100?
7
Reply message RE: Why Shoot at ISO 100?
9
Reply message RE: Why Shoot at ISO 100?
10
Reply message RE: Why Shoot at ISO 100?
12
     Reply message RE: Why Shoot at ISO 100?
13
          Reply message RE: Why Shoot at ISO 100?
14
          Reply message RE: Why Shoot at ISO 100?
18
               Reply message RE: Why Shoot at ISO 100?
20
                    Reply message RE: Why Shoot at ISO 100?
21
                         Reply message RE: Why Shoot at ISO 100?
22
Reply message RE: Why Shoot at ISO 100?
11
Reply message RE: Why Shoot at ISO 100?
15
Reply message RE: Why Shoot at ISO 100?
17
Reply message RE: Why Shoot at ISO 100?
19
Reply message RE: Why Shoot at ISO 100?
23