6. Advanced Functions
2.Turn any secondary light source off. Point the Lumisphere toward the main light source, from the position of the subject and take a measurement. Press the Memory button ⑦ and store the value in memory.
3.Press the AVE./ ∆ EV button ④ and display the “A”mark on the LCD indicating a standard value.
Memory button
Indicator of reading
Set shutter speed
4.Turn the main lighting off. Now, point the Lumisphere toward the secondary light source. While pressing and holding the Measuring button ⑭ , the indicated difference between the main and secondary light source is displayed in EV. At the same time, the standard value and a new measured value are displayed on the analog scale.
Contrast in
EV
Memorized f stop value
f stop value being measured
| EV difference of ∆ EV value | Contrast ratio | |
1 | 2 | : 1 | |
1.5 | 3 | : 1 | |
| 2 | 4 | : 1 |
| 3 | 8 | : 1 |
4 | 16 | : 1 | |
5.The Standard value can be cleared by pressing the Memory clear button @3, or AVE./ ∆ EV button.
Reference:
•To determine exposure after adjusting lights, turn both main and secondary light sources
on, raise the Lumisphere to the 
mark position, then take a reading with the Lumisphere aimed in the direction of camera's lens axis in incident light.
•This function can also be used for reflected light.
•You can select aperture scale or latitude scale by holding Mode button ⑩ and pressing AVE. / ∆ EV.