<p>I don't know how to attach a photo image to a post. So, I upload related photos to my profile. The light set up are shown in <a href="/photo/18190599">this photo</a> and <a href="/photo/18190600">this one</a>. And<a href="/photo/18190618"> this one (ISO400 1/125 F8)</a> and<a href="/photo/18190619"> this one (ISO80 1/125 F8.0</a>) show the whole light source. <a href="/photo/18190601">This photo</a> shows the meter reading. When my camera setting is the same as what the meter reading says, that is ISO400 1/125 F5.6, the histogram of the photo goes straight to the right edge. Again, the meter is pointed to the light source, but not to the wall.<br /> <br /> The purpose of this test is to ensure that I can set up my camera based on my light meter reading.</p>