Studio Research Task 1
1. Describe the difference between Flash Guide Number and Flash Guide Aperture.
Guide Number refers to the product of the maximum flash-to-subject distance and the f-number of the aperture that will correctly expose film or a digital sensor with the specified sensitivity.
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- GN = distance × f-number or GN = f-number at 1m at ISO 100 (used for portable flash)
- GA= f-number at 2m at ISO 100 (used for studio flash)
5500K
3. In the given situation below there is a subject that is lit by a light source from the left side and a
reflector on the right side. A light meter can be used to determine the level of illumination on each
side of the subject. That being the case if the meter indicated f8 on the lit side and f5.6 on the shaded
side the lighting ratio would be;
[a] 1:0
[b] 2:1
[c] 4:1
[d} 8:1
4. If the readings were f8 and f1.4 respectively what would the new lighting ratio be?
32:1 - dont even bother!
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